Another losing session

My last session was my third straight losing session. I started out with $8.25 and ended up with $7.42. I started off folding a lot of hands. Then I got dealt a pair of Ks about 55 hands into the session which turned into 3 of a kind on the flop and then a full house on the turn and I won a pretty good size pot that got me up to almost $9.00. Then about 30 hands later I got involved in a hand from the big blind that turned into a K high flush on the river (the other guy had an A high flush) and I was down below what I started with. After that I just did not play well at all. I stayed in way too long trying to get back what I had lost and just couldn't pull it off. I loosened up my starting hand requirements way too much. I need to make sure I stick to my starting hand requirements and only play those cards. I also think I need to come up with some requirements for hands to play after the flop.