The "closets" next to the bed... Yep, for the most part a real pain to use. We, of course "hang" some stuff in there (mostly rain wear and light jackets) and we use "mesh bags" to hold the stuff on the floor in there. The mesh bags keep things together and you can "toss" stuff in there and keep the top of the bag near enough to the door to grab and pull the bag out.
We don't have a problem with our "emergency exit" window, but, I've looked at it (anticipating a problem eventually) and would try a velco strip, the type used to bundle electrical cords, wrapped primarily around the window rod and then take a turn around wall stanchion and back onto itself. It wouldn't take a lot of pressure to keep the window rod from bouncing off the wall stanchion and I'm guessing the velcro would do the trick without making the window difficult to use.
We don't use our shower (it is where the kitty pan is) and rely on CG facilities for showering... Oxygenics is the shower head that most owners seem to like. If the flow isn't robust enough, they have a retrictor plate in them that is easy enough to remove.
Toilet paper holder. The walls are ~1" thick. 3/4" screws will be safe to use as well as a good wall anchor if under 1". I used some special dry wall anchors that look like thick plastic screws (Home Depot and Lowe's carry them) and cut them off so that they are about 3/4" long. Put them into the wall and then used 3/4" #8 screws to mount our toilet paper roll assembly to the wall. Hasn't come off yet.
Television mount... Have had good luck with the MOR/ryde articulated mount (try to get most of screws into the one stud in the telelvision mount wall).
My 2 cents, your mileage may vary...
2 Cats; J-Lo and Ragamuffin :R
2014 Thor Tuscany 40RX DP
2011 Ram 2500 Longhorn CTD HO
2011 Keystone Cougar 318SAB (now gone)
2008 FunFinder X 210WBS (Sadly gone)