One of the most important things I tell parents of Hoh and deaf children is to make sure that your home is hoh/deaf friendly as soon as possible (long before they start school).
Make sure that the close captions are ALWAYS on - even before they are reading (pr pre-readin) so they are able to connect that the captions "mean something" in relation to the action on screen.
Make sure to get visual signallers (Sonic Alert makes a great, affordable, expandable system) as soon as possible that indicate the phone or doorbell is ringing etc. This helps the child(ren) connect what's happening in their environment -for example without a signalling system, if you disappear suddenly and "magically appear" with someone the child has no idea how you knew the person was at the door or how you knew to answer it, because they are unaware the door bell was rung! Same situation with the phone - how did you know someone was on the other side wanting to talk??
Get yourself and your critical "family" (grandparents, aunts & uncles etc) set up with VP phones, or at least webcams so you can communicate visually using any of the many free video programs (skype, gmail, msn, yahoo etc all have free computer video chats) - Hopefully you are learning (or have learned) and are using Sign Language at least as a second language at your home, but even if you aren't (yet - please start!! it's SOOO important) speaking and listening while being able to actaully see someone's lips move (speechreading) as well as body language is very very important, video chats make this easy!
When you get them an alarm clock once they're in school, make sure it's a visual and tactile type (Sonic Alert, Sonic Boom) so they can start practicing independently getting up in the morning (with parent(s) for back up, of course).
Make sure that your smoke detectors have strobe lights - to visually signal that they are "going off" - EVEN if your child is able to hear a smoke detector while awake with or without a HA or CI, this does NOT mean they can hear it if they are sleeping. For example during the day, I can hear a smoke detector if I'm in the same room with or without my HA - however while alsleep I'm completely unable to hear or understand the alarm (I sleep right through them).
If you have a Hoh child - when they are asleep, for safety sake PLEASE assume they are 100% deaf and make sure visual (& or Tactile) signallers are in place for their protection!
Not only does creating an environment at home that is accessible to your hoh or deaf child mean that they are able to properly navigate, understand and relax in their home it also (perhaps more importantly) instills from a very early age that the Hoh/deaf child has RIGHTS to accessibility outside the home. Advocating for your child inside your home (getting signallers, using captions/subtitles etc) trains parents and children for the advocacy they will need to do once the child goes to daycares, pre-school, elementary/grade school and beyond - which is a huge factor in making sure that your child is able to do and become anything they want to be (and that the school can't "trick" you into thinking that the school can't get services, or your child doesn't "meet requirements for" support services ... which is utterly false).
I hope this helps - feel free to ask as many questions as you want, and if you'd like to PM me, I'd be happy to answer anything you might be pondering re accessibly, raising a hoh/deaf child (from the perspective of having been a hoh/deaf child myself) etc.