This is all good stuff. Yeah, sit outs, bridges, shrimps. Don't forget foward moving shrimps. Everyone always just does them backwards.
I like to clear out enough space in the living room just to work on rolling around. Foward rolls, backward rolls, sit outs...keep moving. Do it steady for about 5 minutes and you get winded and disoriented.
There's also a cool drill: start on your back. Bridge up, slip to side mount position (legs extended, spread). Transition to kesa gatame. Quickly back to your back, repeat other side.
Tie your gi belt around a door knob and practice throws with it.
Judo hops: push up position. Hop across the floor (i.e. all four limbs will be off the ground at the same time and land at the same time. Move across the floor).