I have said this many many times..its not picking more winners than losers that gets most of us...Its dealing with a 2-3 day skid, and still betting the same amount...
Three years ago I won in baseball all summer from March Madness til late August, always betting a safe conservative amount ( some say to step up your plays then , I never have done this)
I had a two week dry spell and gave it all back! It took me two years to get that money back, I learned a valuable lesson, and have protected profits ever since...Its so hard to play everyday and not fall into that trap....it takes time and experience and probably having experienced what happened to me 3 seasons ago...
I don't think many people are cut out for gambling daily , greed is the main reason...Unless of course your betting very very small amounts for recreation...
6 months of winning can be gone in 14 days and it will make you sick for a long ime...