When I do start researching, I end up getting carried away and spending a whole evening looking stuff up and then I've lost the will to write.
LOL That happens to me too! I have a lot more focus with researching than writing, weirdly enough. Usually I enjoy it, though; it's kind of like a fun challenge.
If I followed the old "write what you know" rule, my fanfics would be so boring! Why stick to what you know when you can look up what you don't and still write it convincingly? Sure, it's just fiction, but since we're writing about real people, I like to use as many details from their real lives and the real world as possible to make my stories realistic.
That's not to say I never use details I am familiar with, but I tend to use those for my original characters if they fit. I'll make them from the midwest if it works just because that's the area of the country I know best, so it's one less location I have to spend time researching, and I've written a couple of characters who are teachers because that's a career I know well.
But in general, I usually have to stretch myself way outside my realm of firsthand experience to write the kind of stories I want to tell, and I'm not afraid to do that. It's fun!