Ever since i started picking up the marvel comics(NOW),I have absolutely no idea which comic is going to come out when. Isn't there any system or am i just missing it?

on the other hand iv'e been reading DC ever since new 52 and can easily follow which comic comes on which week!

Marvel.com has a comic catalog which tells you the dates in which comics are suppose to come out. Though I'd recommend checking it often as dates can be pushed back or changed.
 
http://marvel.com/comic_books/calendar/thisWeek?nav=1
 
Hope that helps.

@War Killer: thanks man..