I know this may sound a bit "leet" so to speak but I suggest you try to learn to read notations. It's not easy first but when you have read some books of basic theory or only just one you get the hold of it.

Tabs are great but you find much (and I mean A LOT) more music written in notations than in tabs, but if you are not going to be the greatest guitarist in the world you don't have to know how to read them.

I think chord forms are also important, you don't have to know all chords like F#add13-5 or something like that when you are beginning to learn how to play guitar, try just for start figure out the basic chord forms like the Minor, Major and the 7:ths for both of them..