I've picked up from my daughter (that's Adria, pictured with me) and some of her friends that the polite thing to do when one locks one's LJ is to keep a post such as this one on top.
This is a locked journal - meaning, the vast majority of my posts are viewable only by LJ friends listed on my profile page. (I've gone back and locked most of my old entries, too, because I'm a stickler for consistency when it comes to these things.)
I'm not trying to be cliquey (ugh, I despise cliquey!). It's just that I feel freer to express myself in this journal, knowing who has the key.
I enjoy interacting with other journalers. Just drop me a note if you'd like to (as my daughter puts it) "friend-ize." You can leave a comment here, or e-mail me (the addy is on my profile page).
P.s. I tend to be clueless of (or is that clueless to?) new journalers popping up around me. I mostly only keep up with friends' journals on my list. Sometimes, weeks go by before I realize that a friend has joined the community or added me to their "friends" list. So, don't be shy about waving hello and letting me know you're here :o)