Buy a physical book with tactical exercises
Tips for developing tactics

I've practiced for almost 150 hours on chess.com and still i could hang a piece in blitz games @ gerberk
:-(

one hour of tactics a day keeps the doctor away...and you will improve
This is good advice. By the way sne, you have a good tactical rating for your rating. I think you should focus less on tactics now and dip into strategic thinking if you want to improve. It seems that is the only thing holding your ratings back.
hi everyone, Can anyone please suggest me tips or books for improving my tactics ? My rating is 2244 in chess.com tactics trainer. It has become stagnant from some 6 months. I really need to improve. Any suggestions ? ( answers from higher rated and titled players are appreciated )
Thank you.