So with another post getting me thinking about babyproofing...I just had a thought to share Something we did with the other kids when we babyproofed is that we did not put away everything we would not want them to touch. We did put away dangers and breakables, but I had some things that wouldn't get hurt or hurt them but were still "off limits" so to speak. Mommy's things. I had read in a book (can't remember which) to teach kids from early on that some things are just not for them to play with. And it can take a little bit of time, but eventually your child will learn to respect your things and not mess with them.
This will help them transfer to say, other peoples houses as well. Like if you visit your mom's house with your 18 month old and he really wants to play with her nic-nacs on a table, having had things out that he shouldn't touch will help him know when you tell him "use your eyes" or "those are for the table" that he can't play with them...and that way its not a nightmare to go places that are not so babyproof.
It seemed to work for us!