There is maybe a server or two that i can auto join but other than that how do you join one? I just bought bf3 premium and cant find many matches on battle log, but on here there is a bunch. Also there is a favorite button but i dont see the point of that if you cant join the server. Please help

I've never played BF3, but from my understanding they have a pretty decent set of filtering to help find servers. If you are not finding many, make your filters less restrictive.

A good number of servers on GT have a "Join" button on the page. Using that will take you to its battlelog page. If it doesn't have one and you'll want to join it, you'll need to join by direct connect (if BF3 supports that) or find it in battlelog.