I have to say when I get insperation is because the idea makes me want to jump right into making the video. Also another thing is seeing your video at a convention. I know ANTDrakko back at Anime Boston last year got inspired to make another amv after seeing his amv in the finals. Personally it is the challenge of making a good amv. I enjoy making music videos but the challenge to put it to the song and time it just right keeps me motivated. For there is always something to improve on plus different styles of music to use and different categories of amv's to make. I switched from Drama to Action AMV's for a while because I felt like doing something different and to keep my intrest. So try to switch things up. The worse thing you can do is force an amv. You'll get your insperation again. Maybe download some more amv's and maybe one of those amv's will inspire you to create more.
Procrastinate. After you're done procrastinating, watch some of your favorite videos, and then sit in front of your computer screen doing absolutely nothing for a few days. When you finally get so bored of that go do something else, then watch some more videos. Eventually, jutst get so annoyed with yourself that you open up premiere and start working.
Kusoyaro: We don't need a leader. We need to SHUT UP. Make what you want to make, don't make you what you don't want to make. If neither of those applies to you, then you need to SHUT UP MORE.