cogito ergo sum

I somehow remember what Descrates said once, cogito ergo sum or the original statement was je pense donc je suis hmm... which is means "I think therefore I am." and how about if you think too much ? I would say like me... you just spend hours and hours to think and somehow you delay the act or even you forget to act. I just read in my mom magz that if you think too much you'll have a chance to get the "curse of the talented" which is: depression. Sounds so familiar to me. The abstract and complicated way of thinking some times lead to a self harm instead of simplification if we can't apply it well. I am wondering is there any ways to stop the curse ? or... even to quit thinking for a while. It is good to think a lot, obviously, but it's harmful if we think too much. I delay many things in my life... I consider a lot of things before I act, good if I'm not late... but then it'll be a waste if I'm late or if things have gone, what the avail of thinking, analyzing and considering rite ? My Belgium friend told me that I should've made a move at that time... yeah... I should... and I'm late and thing remains in my fantasy without me knowing whether there'll be a second chance or not and I keep wondering how about if... not healthy of course. I might exist since I'm thinking and I wait till I feel I have to make a move... but again things don't wait some times thus there won't be a need of my existence.