Eat That Frog!: 21 Great Ways to Stop Procrastinating and Get More Done in Less Time
If you want one productivity book, get this one.
Brian Tracy is a beast, and this book is an amazing primer on Productivity and removing procrastination. It is very high level for each of the 21 ways, so you don't get any of the research or many of the sources behind the genius, and the only problem with that is that you might not take the excellent suggestions more seriously.
I have an older copy, and some of the stuff I honestly contend with, but that is only about 1-5% of the content, and even then, its more minor details than major ones overall.