I would advise doing overhead and front squats with an empty bar as a warmup, then use an unloadd bar for semi straight leg Dl's, or better yet, RDL's. These will loosen up everything, hams, quads, and with the overheads, your upper back and shoulder girdle. You could do this everyday, multiple time for flexibility support.
Wrist straps, well, there are divided opinions on this. I am in the camp that unless you are concentrating on a lift for competition, go ahead and use them. Also, do some grip work, pick a heavy bar out of the rack, and hold it until it drops, pinch grip some 45's, and farmer's walks are great.
Sounds like a plan to me, TimD!