Moms aren't the only ones who know a thing or two about baby proofing houses.
Make sure you get covers for electrical outlets, hinges that make it impossible for babies to get into cabinets, plastic security gates to keep him from going into areas of the house you're not comfortable with him being in, and as a general rule try and keep any potentially dangerous items in far away places that he can't reach. Countertops, high tables, shelves - as far as you can get them.