other users: talking about another user in your post? link to his/her profile by adding tildes around his/her name! for example, ~thelowlypeon~ will automatically become a link to the lowly peon's profile!
dates and times: if you hover of a timestamp, you can see the full UTC time. so if a post just says "april 17, 2008", you can see that it was at 3:04am by hovering over it
i often use the term baseball to disguise the topic of sex. it is also my default conversational piece when i want to change the current topic.
i don't eat meat. but i eat fish. and dairy. so to say i'm a half-assed vegetarian would be an understatement. but i often do just to avoid the whole explanation.
i like cycling. i do it as often as i can. now that i'm in china, i rarely do. so try not to rub it in. i miss my bikes.
unread mail: the little number next to your mailbox is the number of unread messages you have -- these messages are either from your friends, or they're notifications from avalantern
updates: if you want to update a blog without changing the original content, simply click the update link when viewing your own blog. this will show up with a timestamp, and it will be clear that it was not part of the original post