As I tell all new members and those coming back,"Don't look at good health or weight loss with an all or nothing mentality". If the only healthy thing you did for yourself today was drink 8 glasses of water, that's still a step in the right direction.
Start with some simple changes first. Don't try to do everything at once or you will end up frustrated. As the old song goes,"accentuate the positive and eliminate the negative". give yourself credit for all the positive things you do and don't beat yourself up because you're not perfect. You don't have to be perfect to be healthy.
Remember, there is more to good health than a number that stares at us from between our toes in the morning. Look for other ways to measure your success that don't involve the scale. Over time, you'll notice your energy starting to return. you'll notice you sleep better. you'll notice you get fewer colds. you'll notice your clothes fitting better. these are all signs of improved good health and every bit as important as seeing that scale move.