If you already have your callsign and can see your entry in the license database, then I recommend you register to get an FRN (user ID) and password on the ULS site.
Go here:
FCC Universal Licensing System (ULS): ULS Home
and click where it says 'REGISTER' (next to NEW USERS).
Once registered, you should be able to associate your callsign/license record with your FRN. From then on, you can manage your license directly. Among other things, you can file a change of address, request a duplicate copy of your license (if it's lost or destroyed), or renew your license. All of these are free of charge. I think the only thing that requires a fee is applying for a vanity callsign.
Yes, you'll get a copy of your license in the mail. You'll also get one any time you do any of the above mentioned procedures. These days, the license comes in the form of an 8.5"x11" laser printed sheet with two copies of the license that you can cut out: one is 5"x7" which can be framed, and the other is sized to be carried in your wallet. (You need to fold it in half, and then you can laminate it or just put it in a plastic sleeve.)
It used to be they just used special perforated form-feed document/envelope combos with carbon paper on the inside. They'd run them through a line printer to stamp your address on the outside of the envelope, and the pressure would stamp the license document inside the envelope at the same time. All you had was the fold-over, wallet-sized document, and it was an ugly yellow color.
BTW, when the time comes (in 10 years
), you may get letters from various places offering to help you renew your license "for a small fee." Don't bother with these. The FCC charges no fee for license renewals. You can always do it online via the ULS site free of charge.
-Bill