Oliver Burkeman deals with this issue in his amazing book called The Antidote: Happiness for People Who Can’t Stand Positive Thinking. The problem is that you do not feel like doing whatever you need to do. The trick is: you do not need to feel like doing it, but do not let this prevent you from starting to work!
All that is actually necessary is that you must want to see the project finished, the unpleasant work done, or an annoying client handled. Do not focus on what you would like to do. Do what you need to do instead.
3. You are putting the task off because it is so boring
Do not rely solely on your will power. If it was strong enough, you would never postpone anything in the first place, right?
Use the if-then strategy. If it is 3pm, you will stop doing what you are doing and begin the giant pivot table. It is more than just planning what you will do, it is determining when exactly you will do it. Not following such plan is already much harder than just postponing a task you have not included into your program.
-jk-
Article source Business Matters - website of a leading British magazine for small and medium sized companies