In the future I'll probably write about Getting Things Done (GTD, for short), David Allen's bestselling book about productivity and stress reduction. I am a huge fan -- not a day goes by that I don't actively use GTD's core principles. The best place to start with GTD is to read the book, which costs about $10 and is a quick and engaging read.
Once you're ready to learn more, check out this list of free GTD resources available from the David Allen Company.