How do you make your wall private to your friends on facebook?

How do I keep friends from viewing wall posts that I make on other friends' Facebook pages?

• I have a friend that feels the need to track every comment I make and every wall post I make to other friends, and is able to because my settings somehow let her know that I made a comment on someone elses page. It says," Annie commented on so-and-so's wall", and then it shows my post, which makes her feel the need to comment along with me, it is extremely frustrating and is getting annoying. Is there a way to not show this person every freaking thing I post without ignoring them or taking them off my friends list? Thanks =)

• Answer:

  of course there is a way, got to privacy setting --> custom --> hide this from... and then chose the ppl that you dont want ur post to be seen by. GOOD LUCK