1) Put a login header on friends pages, or a 'hi Ellen' message. You can't tell if you're logged in or not from that page.
2) Don't un-screen comments when you reply to them! I hate hate hate that! When I screen comments, it's so that people feel free to post private information. I hate that it becomes public if I have something to say in return. I always re-screen them, of course, but what a pain. The default is all backwards.
3) When browsing by next/previous entry - skip private/filtered/friendslocked entries. Don't tell me that I can't read that entry and give me no way to browse past it! I don't even want to KNOW that there's a private entry there - it's kind of invasive.