Use an inspirational photo as your phone's background or lock screen. Trying to get back to your college weight? Use a photo of yourself from when you were thinner to help motivate your diet. Or use your phone's background to shock yourself straight; a smoker trying to quit might use a photo of damaged lungs to keep them on the right path.
Set reminders to reinforce good habits. If your goal is to eat healthier, set an alarm for just before lunchtime each day to remind you to stick to your plans. Or give yourself a phone-reminder pep talk right after you leave work or school for the day to get yourself motivated to hit the gym.
Download helpful apps and move them up front. Are you using any apps to manage your New Year's Resolution? Move them to your main screen! Someone trying to manage their debt might move their Mint app forward so it's easier to reach for a helpful financial tool instead of Angry Birds. Same goes for weight-loss trackers or apps like iQuit.
Do you use your phone to stick to goals and resolutions? Share your tips in the comments!