When it comes to getting fit, you know what you should do (hint: move more and eat less—or at least better). It’s actually doing it that can be so difficult. Cold morning? I’m the first one to want to sleep in! My muscles will be too stiff to jog in the park, I tell myself. I know, I know—just get on the treadmill.

If only it were as easy to make it to the gym or order the salad as it is to concoct reasons not to, we’d all look like, well, Jillian Michaels. Which is why we went straight to the Biggest Loser trainer and SELF contributor—a woman who simply doesn’t do excuses—to get her cures for wavering willpower. Keep Michaels’ stick-with-it advice in mind when you’re looking for a way out. Staying the course will come more easily, and so will getting a standout body!

Excuse: “I have zero time to exercise!”
Michaels says: “I feel your pain—my life is crazy, too. But good-for-you habits are the last thing that should go. If you don’t take care of yourself, you’ll have less energy to be that supportive person in your loved ones’ lives. I tell working moms to ask for help. It used to take a village to raise kids; you can’t do it on your own.”

Excuse: “I can’t afford a gym or fresh produce.”
Michaels says: “Commit to a $100 investment in 10 fitness DVDs and you’ll have enough variety for six months at least. You can do a whole workout—sit-ups, jumping jacks, squats—without any equipment. And imagine the cost of taking diabetes meds for the rest of your life—much more than the extra $50 a month you should spend on groceries and fish.” Try this free, do-anywhere workout created by Michaels to get started.

Excuse: “The cookies in my cabinet are calling me!”
Michaels says: ‘I don’t keep junk in the house or let waiters bring bread to my table. I have no discipline, so I protect myself from temptation.” Stock up on some of these 30 healthy snack options instead.

Excuse: “I can’t get up early to work out, and I’m tired at night.”
Michaels says: “When the alarm goes off, ask yourself, ‘Will going back to sleep help me reach my great goal?’ If the workout isn’t attached to a larger reason—like having the confidence to get back in the dating game—it won’t stick.” Got 10 minutes? Try this superfast workout you can do in your living room.

Excuse: “I’ve hit a plateau; I give up.”
Michaels says: “Get selfish! Don’t think you’re asking too much of the world or of yourself. Push through by believing the new, improved you is your destiny. There’s no reason you can’t have it all.”

Excuse: “I start off Monday with the best intentions, and then life takes over and I flake on my workouts.”
Michaels says: “Set a daily or weekly target and reward yourself every time you meet it. I get my eyebrows done or download songs from iTunes.”

Excuse: “I get so bored counting all those weight reps or running.”
Michaels says: “As you exercise, think about what you’re trying to achieve. Having intention behind your actions is extremely powerful. And nothing beats a good beat to keep energy high. I want to die when I don’t have my music! Any song by The Roots totally gets me psyched. Finally, you don’t have to kill yourself to get a workout. Running is one of the best ways to get smaller, but I hate it, so I do only one 10-minute mile.”

Excuse: “But the couch is so comfy!”
Michaels says: “If you need a couple days off, take them. You don’t want to get bitter or burn out.”

Everyone would love to live to a ripe old age, but not if it means looking and feeling like an over-ripe old vegetable. We need to understand that though getting older is inevitable, getting decrepit is not.

Here are a few secrets that will have you looking forward to your 100th birthday!

Tai Chi: An Exercise in Anti-aging
Tai chi, the choreographed meditative exercises that have been a healing art in China for thousands of years, is practiced by over 100 million people worldwide and owes its popularity to a simple fact - it’s enjoyable and it makes you stronger.

Recent studies confirm that when practiced regularly - 30 minutes, three times a week - it has numerous health benefits including: increased energy, decreased stress, an immunity boost against viruses, lowered blood pressure, better cognitive functioning, increased joint mobility, an improved cholesterol profile, relief from fibromyalgia symptoms, and even a better night’s sleep.

It also increases leg muscle strength and provides better balance and posture. Perhaps the best part is that tai chi is a gentle exercise that can be performed by anyone at any age. Click here to find out more about tai chi.

Centenarians I have met also take advantage of other rejuvenation techniques the Chinese have known for thousands of years - like acupuncture, acupressure, and energy healing - that increase energy, promote health, and balance the body and the mind.

Diet: The Cornerstone of Longevity
It is no surprise that diet is an essential factor to health and longevity. So what should you be eating? In my studies, I found that the centenarians of two reputed “longevity capitals” - Okinawa, Japan, and Rugao County, a rural community four hours north of Shanghai - shared a nearly identical diet.

These long-lifers eat mostly fish, vegetables, mushrooms, seaweed, corn, and buckwheat - and virtually no meat. Scientists have confirmed the health benefits of a diet high in fish and vegetables and low in animal products. These centenarians are living examples, as they suffer from very little heart and liver disease and have negligible rates of cancer and degenerative diseases.
Environ-Mentality
When it comes to longevity, environment is half of the equation. From the verdant valleys of Ecuador to the rugged mountains of Armenia to the pristine foothills of the Himalayas, centenarians live in environments that exhibit the same characteristics: clean air, good water, low stress, close communities, and unspoiled nature.

Take a tip from these centenarians and drink only clean, filtered water. Connect with your community in a positive way. Find every way you can to bring nature into your life, from planting more trees in your area to more plants in your home.

Avoid the environmental factors that are damaging to our wellbeing and know what to look out for. Just a few things to avoid include xenoestrogens, which are present just about everywhere, pesticides used on vegetables, hormones injected into meats and poultry, phthalates leaching from plastic bottles, and dioxins from bleached paper products. You can avoid these chemical compounds if you buy organic foods and use glass containers and unbleached paper products.

Keep it Simple!
Centenarians’ lifestyles are simple. The centenarians I have known lead active lives and get plenty of rest. They are dedicated lifelong learners and avid travelers. Enjoy your years and you will have many more years to enjoy!

I hope these suggestions further your longevity goals! I invite you to visit often and share your own personal health and longevity tips with me.