According to some, writer's block is a "bullshit excuse for laziness".
To those people I say suck a tit.
The best thing to do though, is to write. Take a break from what you're trying to write, but don't forget about it completely, y'know?
Like don't dwell on it constantly because then you'll have no fuckin' clue where to go because you're thinking about it too often.
But like put it out of your mind a few weeks, months, years, (hopefully not as long as the latter two) what have you. Then one day you could be musing on it briefly and pch00000, there ya go.
Some worthless advice from a somewhat seasoned writer.
--E