Michelle Aguilar won NBC's "The Biggest Loser" challenge by shedding 110 lbs. Now, she plans to keep it off -- and she tells the secrets she learned!

"I think one of the biggest things I learned from doing the show was that you have to start slow," Michelle tells ET. "Granted, we did everything at such an accelerated rate that it's easy to get burned out. I think for people at home, it's more practical to start slow and start with eating smaller, working out more, moving more, getting out of the house and being physical so that you don't get burned out."

Michelle says that once she wasn't so focused on weight loss, but on living a healthier life, the weight loss followed.

The next tip is: Keep a food journal. "It's so important. I think they say people will lose 20% more if they keep a food journal," Michelle continues. "Just being able to see what you're physically putting in your body makes a huge difference. You have to be accountable for it if you're going to write it down."

Another important thing that Michelle learned from her trainer Jillian Michaels is not to guilt-trip yourself, which is something the majority of us do if we fall off our diets.

"I'd grab a little piece of something that I shouldn't eat and then I would just eat the whole thing. Then that bad moment would turn into a bad day, then it would turn into a bad week, then a bad month, and then a bad year. And next thing you know, you're severely overweight.

"And so I would say to people, 'Don't let those bad moments overtake you.' You know, you can have a bad moment but just get up the next moment and do something, or [call somebody] and don't guilt yourself."

Michelle's last tip is: "'If it's just getting to be too much and I just can't take it, I go and whiten my teeth because then I know for at least 30 minutes, I can't eat anything and I'm preventing the self-sabotage thing from happening."