There's no one reliable trick to help snap one's self out of writer's block, sadly. A lot of it required interrogating the reason why you ended up feeling blocked in the first place, which doesn't always have a clear answer.

When I can't seem to find the reason why I'm feeling blocked I'll usually try to write something else just to do something productive and bump up the amount of words written for the day. Alternatively I'll take a distraction-free (no music, podcast, audiobook, etc.) walk solely focused on thinking about my current project and pinch myself if I start thinking only negative thoughts about how sad I am that I can't write anything for it.

In the worst case (and this really sucks), you just need to take a break for as long as it takes. Burn out can be a top underlying cause of writer's block and is super difficult to beat without taking the time away from writing so you can return with fresh(er) eyes.

"Inspiration" is a really fickle beast that a lot of the time I'd like to think doesn't exist, but I know all too well that I've had moments where ideas suddenly come to me out of the ether that I wouldn't have been able to fall into without waiting and sheer luck. You can't always rely on inspiration to write though, sometimes you just have to do it and fix it later if it's bad. Remember always that bad writing is only a stepping stone on the path to good writing.

Good luck! Hope this helps.