When I need to be more productive, I look for quick wins!

Quick wins are small things I can do, and finish (very important!), in a very short period of time, like 2 or 5 minutes or so. 

Doing those quick wins, will get your mind switch to a positive mindset of accomplishment, and the pleasure that comes with that. And it will make you want to accomplish more.

And if I have larger blocks of work to do, I try to divide them up into those smaller blocks, which can be done as quick wins.