the first thing is to find out what you have, and an overstreet price guide can help u with that, and if you dont already have the books in bags and boards and you wish to protect them then go to your local comic shop and pick some up, or order some online.
if you have some books you just have to get graded right away and dont wanna check em out first that is your right, the first time i sent submissions in i went thru wizard to send them in and got a discount and mailed them dircet to CGC.
one thing you need to consider is the age and value of the book, because that will determine how much it is to grade each book. but remember to the casual observer a a fn/vf book might look like a nm/mt book. so you mite consider scanning the books on here under the please grade my book link.
just a few things you might think about.
lookin for 9.8's or HG raw deathlok, Avengers:The Initiative U.S.1, 2001 ASO, Machine Man,Omega the Unknown, New Mutants and Cable(2008)
Loc: Southern California
As a newbie myself, I found 2 amazing resources this year that were worth paying to join.
#1) CGC: Just sign up, read the instructions carefully and you can submit yourself - you also get a small discount, but it sounds like you have alot of books, so in the long run, should add up! And be patient.... it can take a while for your books to get graded and ship home...
#2) Comicpriceguide.com - it's cheap, easy to use and you can organize and catalog your books - not too mention review the pricing... There are alot of other softwares, (or even just an excel spreadsheet) - but this one is pretty nice.