Go take a long shower after a tiring day at school or work. Wait for thirty minutes, at least, before stepping inside the bathroom to cool down your body. Then let your mind do the rest. When the mind is tired, it doesn't filter 'distractions'. Hence, ideas come to us freely. This is the reason why plot bunnies appear in the shower. 

After your refreshing shower, write. Even if the plot bunny isn't an update for your fic. You just need to get into the zone of writing.

Write, write some more and edit later, like what we learned from Daphne Grey-Grant. 

- Keeper

/now I have an answer for this older post on writer's block