What tips do you have to prepare for PSYOPS selection?

Learn that there is no "S" in PSYOP
Ruck, run, and ruck some more. Ensure you can put coherent thought to paper. When in charge, lead, when you're not, follow and be a team player. Be honest and dont give the cadre answers you "think" they want to hear

Just because it's only 10 days. It's a tough 10 days. Getting woken up in the early hours to read and write stuff. The academics can get people kick out.

Lots of cardio. You'll thank me.