If you are constantly floating in a sea of post-it notes reminding you of all of the things you have to get done, you might want to consider an online program for keeping those lists organized. Many of these let you email a new task directly to your online list so you don't have to worry about scribbling on that little post-it note again and taking it back to your coputer to enter to the online list. There are a variety of options out there - some free and some not - but most of them do the same basic thing with a few bells and whistles here and there. Check out the following options: (add it to your to-do list:)
Ta-da List
Todoist
Nozbe
voo2do
Vitalist
Remember the Milk
Toodledo
Listigator
If you prefer a non-technical aid to help you get your projects done, I would recommend a book that came out a few years ago called "Eat That Frog" by Brian Tracy. The main message that I got from that book is that you should do the worse part of a project or the thing on your to-do list that you are dreading - first. One of the best books I ever read on productivity was written for creative types (artists, writers, etc.) but it truly is a great "kick-in the-butt" type of book. It is called "The War of Art" by Steven Pressfield. Even though this book is written for artists, I highly recommend it for all consultants. It is quick read and should definitely be on your to-do list, whatever list you decide to use.