I like to make lists when I'm stuck. Make a list of the things you need to do to get to where you want to be. Break the list into smaller and smaller pieces. Keep breaking it down until the first thing is something you can easily do and check off the list.
If I have 100 things to do then I try to do the first 10 and then plan to take a break. Sometimes after the first 10 I'll just keep going and get a lot more done than I thought I could.