Nightime-Fire-safety = Closed bedroom doors:)
I know I am not the first to mention this.
And I know it may be an uncomfortable idea at first, but it is statistically safer for everyone in your home to sleep with the doors shut. It is how my husband and I put our 20 month old to sleep, our family is comfortable with it but I understand that this may not be the best for everyone. I think that the previous responses to this topic have all been great and filled with great advice. The only things I could possibly add is food for thought...
Be sure that any barriers you place in front of doors can be quickly and easily removed by you, your family members, and especially any emergency responders (who may be unfamiliar with how your device works).
If you choose to leave the door open make sure that you have barriers in place that keep little ones out of dangerous areas- perhaps leaving only a route to mom and dad's room available. Kids can sometimes learn to silently climb baby-gates (and man are they fast!), you can string bells or noise makers to them which may wake you up at night if you are a sound sleeper.
Make sure to read up on fire safety tips for around the house, make a firm habit of following those rules throughout your day and teach children about them too (both of which will help you sleep better at night).
Review fire escape/emergency plans and talk about them with other family members- doing so can help everyone minimize panic in an actual emergency.
Keeping an evening routine is great for kids' relaxation, suprises are, well, unexpected- and exciting. Getting them involved in the process now will help them to develop the skills to relax themselves as older children and even as adults... One of the things we do is light candles when we settle down for our snack and a little tv time (I keep them high out of reach and store the lighter in a high, locked drawer in another room---kind of ironic for this topic:), then we get to blow them out before we head upstairs. This is only an example to say that anything can become a routine- you could simply have him turn out the lights in the house and say goodnight- see you tomorrow to everyone and his toys. Please be safety conscientious if you light candles around your little guy:)
I could probably go on and on, but basically what I'm trying to get at is, you can't be there every second of the day- even as a SAHM. You can't guarantee that you will be there the first time your kid learns to do something new and possibly dangerous- But taking precautions and safeguarding your home are GOLDEN. Knowing that your child can't escape the house, consume bleach or other dangerous substances, or start a fire if he happens to figure his way silently out of his room at 2AM, could be just enough to help you fall asleep at night, that is if youre not up worried about wedding plans:)
Some quick links for anyone interested in fire safety info:
http://www.homesafetycouncil.org/safety_guide/sg_fire_w00...
http://www.usfa.dhs.gov/citizens/all_citizens/home_fire_p...