I get like that with just about everything...lol. Several people have said what I think helps...do something small that you can accomplish quickly. I'm very impatient and want to see the finished result yesterday.
I bought this new Horizon last Thursday and didn't even practice sewing on it till Saturday afternoon. Today I started a small wallhanging that I should be able to finish really soon. My instruction class is 1/27 at the dealer and then right after that my whole sewing room needs to be rearranged...must buy tables etc. I'm using the machine downstairs on my dining room table and won't bring it up till everything is just the way I want it. Then I think I'll feel like really diving in on the 3 projects that I have planned.
Oh...looking at fabric sites and going through my magazines and books really gets me inspired too...like others have said. And just reading and looking at the pictures on this site helps too.