Can anyone tell me more about PSYOPS selection (than it's hard or physical or mental), specifically the day-to-day details?

Selection is exactly what you think it is. You are being evaluated against the SOF attributes to see if you are suitable for special operations training. I will not give you day-to-day details as that would undermine the point and purpose of selection. BUT, what I will do is give you some pointers and advice:
1. Forevermore refer to the regiment as PSYOP not PSYOPS
2. Ruck, Run, and Ruck some more
3. Brush up on your general knowledge (history, math, english)
4. Learn to put coherent thought to paper
5. Ruck, Run, and Ruck some more
6. Be personable, friendly, and open minded. They aren't selecting off a quota, so dont F*** your buddy thinking you're competing for limited slots. (Peer evaluations are weighted HEAVILY)
7. Learn how to talk to people, seriously. Go to a public place and start talking to random strangers, this helped me.
8. Be honest with the cadre and with yourself
9. Ruck and run just a little bit more
10. When in charge, be a leader. When you're not, then learn to play on a team. I cannot tell you how much this matters in our job. Everyone wants to be a chief, but no one wants to be an indian, swallow your pride and support your teammates.

SGT P said it best :
[When in charge, be a leader. When you're not, then learn to play on a team. I cannot tell you how much this matters in our job. Everyone wants to be a chief, but no one wants to be an Indian, swallow your pride and support your teammates.]

This is important, help out your buddies not only do you have to get peered well but you must stand up well in comparison to your peers.

run a good amount for endurance, do "farmer's carries", put some weight on your body and walk with it or squat it, learn some knots because many people show up not knowing them and you'll have something to offer your team.

Be a team player, don't take it too seriously it can be a really fun experience.

oh and bring canteen straws and a good multitool

Can’t get toonin the weeds, but make sure you can ruck, are personable, and can think quick on your feet. I went in 2011. If you have direct questions PM me.