A few ideas I have! If you have a computer at your work, a fun mess about in mspaint never hurt (even if it's just drawing fun shapes and such). You could also try learning some origami! There's endless possibilities with what you could create there. Bringing a small sketchbook to doodle in can help too!
I'll admit I'm not too well versed in crochet myself, I'm more of a knitter ehe. But making quilting squares is always a fun pass time for me that doesn't distract too much from whatever my work focus is, maybe you could even try some funky patterns :D
These are all I could come up with rn, hope they help!
Kind regards, Atari @986.29