Finding Objects Created by User

Anybody know of a good way to find objects created by users?

Here's what's happening:  I start a project to work on, then someone once
something done asap so I stop what I'm doing and work on the new project,
then in the middle of that one I might get another project, etc....  Or
what happens is I finish a project then I send an email to the requestor of
the project to get together to test the finished product but the requestor
takes a week or 2 to get back to me and I've already started another
project, but for me anyways it's a rare occasion that my finished project
isn't exactly what the requestor wanted or they want something different.
It's all very confusing, so I would like a way to scan the system for all
objects I created so that I can look at each one and determine if I'm still
working on it or if I can delete it.

TIA,

Frank