When I began to put together and EDC, I looked at the list of things in Doug Ritter's pocket-sized PSK and took it from there. I think what you put in yours is going to depend on you and your environment. If you are like many, you will think and rethink what is in yours over and over again. Nothign wrong with doing so.
If you want an idea about what some EDC take a look at:
http://forums.equipped.org/ubbthreads.php?ubb=showflat&Number=119353&fpart=1The list for mine is in there, and I am in an urban environment.
And welcome!!