I am exactly the same. I burned a lot of film from the mid 70's to the mid 80's without self direction and eventually quit photography because I did not see where I was accomplishing much. I restarted in the late 90's much more focused and am now happy.
There is the perpetual problem with labels such as "documentary projects" because we each have our own definition. To me, a "project" means the desired result will be a tightly edited cohesive body of work, ready for presentation, that conveys a predetermined message. Without that, most just end up with a large number of photos on a general theme. We are all different. I am just influenced by my retired career as a goal oriented businessperson.
I cannot photograph and then figure out what to do with what I have. I must have a predetermined objective and start putting the finished project together very early in the photographing process, even a mental image if a very short project. That tells me what photos I need to add to best be able to deliver my desired message.
My "projects" can be as short as 3 hours like the one I did last Sunday on a tent revival I passed by in Alabama.
http://rangefinderforum.com/forums/showpost.php?p=2486388&postcount=473
Or my projects can be over 5 years long and continuing such as my depictions of ordinary Cuban people in their natural environment
http://bobmichaels.org/Cuba_intro.htm but my basic approach is similar