Go to this part of the forums; Rental Servers and such
There you can click on "bookmark
" links, where you can bookmark the server.
If you by any chance happen to like a server that you're playing in, hit (default) Tab for the scoreboard and then hit F5. Then you'll notice a message on the top of the scoreboard; "You successfully bookmarked the server
When you like certain people, you can also add them as friends ingame ^^
Hit (default) Tab and hit their name, then you'll notice "You successfully became a fan", you'll stay their "fan
" until they add you back.
When ingame, you'll notice their name in green at the scoreboard ^^