Don't waste your money on a day planner. If you want to get more efficient with your time, you don't need one.

I'll give you three good reasons why this is true (whether you believe it or not). Here they are:

The truth is, there is no one magic tool that will make you more productive. Certainly not someone's overpriced, bloated, destined-for-the-closet day planner.

If you really want to become more productive, do yourself a favor. Go get a copy of David Allen's “Getting Things Done”, read it, and just do the work. You'll be more productive, you'll have more money in your pocket… and more room in your closet.