Great advice in this thread. Also I could add that it is very easy to grab the opponent if you do a directional attack close to the camera, so that the opponent gets hit towards the screen. That way he won't move away from you (and cannot recover before you can get to him and grab).
100k GS on 19/05/10
unlocked with "Well Played"
achv (60G) in Dante's Inferno
200k GS on 08/12/11
unlocked with "Master Collector"
achv (20G) in Game Chest: Solitaire (WP)