Wow does this ever sound like my life recently. I was going to say get off the computer and just go do it, but glad I checked your posting history first. Turns out you haven't been on WP since MAY!!
But I suppose that doesn't mean you haven't been online elsewhere. If you have, the first thing I'll suggest is shut the computer off.
If that's not the case, what about the TV?
Those are the first two culprits that start interfering with me when my schedule gets messed up by kids out of school, because I don't know what else to do with myself at first.
All I can think is ask yourself exactly what's distracting you from doing what you need to, and shut it off, close it, or whatever you have to do to get rid of the distractions.
Get a towel, go into the bathroom, turn on the water, undress and get in the shower. Once you get in there, you'll figure out the rest. It's like riding a bike.
I know what you mean though. I get stuck too. The only solution I've ever found that works sounds so stupid it's undoable, but it's the only one there is.
Just go do it!
_________________
I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...