Remember if he goes into a very deep sleep it might be hard to wake him hun. Try and keep him at a 15 degree angle or more to keep his shunt draining well - as we said earlier, their soft spots get boggy if they are flat for a long time.
Also remember to keep a check on his eyes - we lay Tegan flat and go behind her, try and get her to move her eyes to look at us and if she can't, PANIC! Lol Also our neuro told us one of the best signs to look for is their eyes don't quite match when theres a problem - one eye will look lazy.