Spend time on it, although, please do not mistake to quit your day job entirely. This involves some tricky time management but with a little discipline you’ll be able to squeeze it all in.
Take a walk. Run a mile or two. Send all those endorphins coursing through your veins. Exercising certainly clears and relaxes your mind and allows for anything to pop up.
That last one may be the hardest, but it will releave you of a lot of pointless stress.
Just accept it all ready….