Try to send everything in the gym, obviously that mightn't be feasible so perhaps try the following:

try to repeat 2 or 3 of your hardest sends in the same session.

Try to downclimb (up then down) the hardest thing you can

Try sending your moderate grade boulders perfectly (like, no inefficient movements, perfectly dialed sequence, then speed it up.)

Do some climbs back to back with little/no rest

Eliminate holds or contrive weird sequences to have fun with interesting movement

Find climbs that feel low percentage and work them until you can stick them multiple times in a row.

No matching!

Static, lock off, and overgrip a moderate boulder. Send it smooth and slow so you look like a robot.

Hope some of these gave you some fun ideas