Give Your To-Do's Context
In your todo app of choice (I'm personally a longtime Omnifocus user), here is a tip:
When capture to-do's, be sure to include context - you future self will thank you.
Call dentist's office
Might seem perfectly clear to you at the moment you capture it. Buuuut in three days it might not be so clear. How about:
Call Dr. Smith's office to make an appointment about your crown
Is much more clear, and will be a lot less work to decipher later.
The extra 10 seconds you spend now might save you minutes of headscratching later.