For example, have some fresh fruit every day. It can be simple: a banana, an apple, or a slice of watermelon. Too easy? Add veggies. Include tomatoes and lettuce in your sandwiches, have steamed broccoli and carrots with dinner, or simply have a veggie-laden soup or salad. And don't stop there. Start drinking at least one cup of water per day. (And no, that little tiny cup doesn't count.) Keep it up until it becomes a habit. Remember, you're not on a diet; you're simply making a couple of healthy changes.
When you go shopping, read labels. Find a whole-grain, sugar-free replacement for that white fluff you've been calling bread. Pass up those super salty, unnaturally orange cheese puffs, and instead get some fresh grapes to snack on. Start replacing unhealthy foods with beneficial substitutes. Choose a baked potato instead of french fries; swap that doughnut for a whole-wheat bagel or a bowl of fruit, and go to Subway rather than McDonald's. Results won't be immediate and will require hard work... but your body will thank you.