Ok, so you're getting a little tired of the same chord forms. Well fret not! (Ha ha)  Hear is a listing of more usable chord forms. You can substitute any letter name Major for anything in the Major/Major Seventh/Major Ninth/add2 add9 area. In other words lets say you're tired of the sound of G Major? well use G Major Seventh or G Major Ninth any other of the G major chords I could think of. They're interchangable. You're not breaking any musical rules by exchanging them.