If you know your opponent needs a particular card then hold onto it. You can discard your own 9 or the jack depending on other plays made And you have a 9 of spades and jack of hearts but not much else to go with it. If they discard something that kind of goes with your hand, but not well enough you can likely safely discard something close to it. When you pick up from the drawing pile they are watching this and will likely not toss another card that goes with it. Small cards like two and three are worth considering picking up. Most of the time you'll want to draw from the deck - unless of course you can pick up an ace, a card that makes a run, set or goes well with at least 3 of your cards. The more you can remember what they are discarding, what they are uninterested in and what they pick up the better youll be able to make decisions Pay attention to what cards they pick up. You will usually want to get rid of your big cards unless a large part of your hand is coordinated bigs Besides runs and sets its usually the next best thing to keep Here is a site (I didn't know that until now, oops) But I would like to share some tips for anyone who is brave enough to try it I used to play poker full time so I was able to pick up on the game quickly.

Took me three days of playing quite a lot. Its pends at level 35 (requirement says level 45).