Remember the days when Mom reminded you what you needed to take to school or to do that day? Well, now we have a handly little email service that does the same thing. It's called hassleme.co.uk. At the website, you give your email and pick how often you'd like to be reminded (for example, once a day, every three days, once a week or whatever you choose), and what the reminder should say.
Then you'll get email reminders with the frequency you requested, and you can cancel the reminders anytime.
If Woody Allen was right, and "80% of success is just showing up," this service can help you show up. One of my reminders concerns marketing my book, another is to make sure I call my Mom once a week (kind of ironic, I guess...).