Einstein said insanity is doing the same thing over and over again and expecting different results. Just playing is unlikely to make you better. You need to think about how you study. Have a look at my blog. Maybe you find something useful there http://becomingachessmaster.com/about/becoming-a-chess-master-introduction/
http://becomingachessmaster.com/study-plan/
I wanted to increase my chess skills and i became premium member, i started playing every day 1-2 hour trainings, i'm doing this 1-2 months and i have no results, my rating was 1470 and now it's 1280, i'm little dissapointed.