abstract: the abstract section of blogs is also good to let people know if they shouldn't read your post. so if you post about the end of harry potter VI, people won't read the blog until after they've seen it!
comments in the recent activity: if you don't want to see all the small comments in your recent activity, you can opt to hide comments in your settings
timezone: move around a lot? avalantern can detect your timezone for you, but if you'd prefer, you can set it in your settings
replies: if you read a comment or an ellipsis that you want to reply to, click the reply button below the post. this will automatically let the user know you're talking to them, and it will allow you to see the whole conversation by clicking "view"