Have visual reminders everywhere you go. At home, at work, in the car. When you are constantly reminded of your healthy lifestyle, you remember to keep up with it! Also, being reminded that you are healthy will bring a little bit more confidence every day knowing you ARE doing it!
When I first started out, I made my vision collage. Then I need a reminder at work so I made a goals calendar that I hung next to my monitor. When that wasn't enough, I hung up the fitness class schedule for my gym. Now I've added my training schedule. Reminders are at every turn!