iOS: We all have those things we want to do more often. While a to-do list can help, Radar doesn't just remind you to stay up on your repeated tasks, it gives you stats on how often you succeed.
Radar allows you to set up recurring tasks, specify how often you should do them, and will provide reminders when that time grows near. As an added bonus, you'll get stats showing how often you do your tasks, when the last time you did it was, and when you should do it again.
Radar: track things you do often [iTunes App Store]