This had to be one of the first tips on the site.
The principals in this book will be at the core of most of what we share here.
We expect you won't have to read the book to get some benefit from this site, but we are confident you will find it immensely useful if / when you do read the book.
Read David Allen's book "Getting Things Done - The Art of Stress-Free Productivity". If you are like me, and have trouble actually reading for any length of time, an audio version of the new and revised version of Getting Things Done is also available at Audible.com.
You might also like to check out the Getting Things Done website.