I would recommend using the Tactics Trainer here at Chess.com on a regular basis. For myself, this tool has been very helpful. I also find a lot of value in using the Chess Mentor here. I try to play no more than 7 or 8 games online at a time -- the fewer the better really -- and this allows me time to really consider the positions and alternatives. I'm not sure I could improve if I played a lot of games and had little time to think about any one of them. I hope this helps -- it works for me.
Neil
who is the best way to improve?