Daddybear has an excellent (funny and true!) list for when it is and is not appropriate to wake up your husband...
For a taste:
1. Do not wake up your husband for inclement weather until the dude on TV is telling folks five miles from your house to get in the basement.
2. Do wake up your husband when you hear something that may or may not be a home intruder, large critter on the porch, or ghost.
3. Do not wake up your husband for a sick child until the child tells you it is sick. That is, of course, unless said sprog is an infant, in which case neither of you will be asleep anyway.
4. Do wake up your husband if the child announces said malady by spewing like a shaken can of cheap beer.
for the rest,
Go here, enjoy!
Read the rest, and tell me, what other rules would you suggest?