Congratulations! They are awesome beasts. They can be frustrating at times but they are better than most of the stuff out there.
First. Set up a while to read through the little comic manual they should have given you entitled "The Newbies Guide to Airstreaming" cross referencing it with owners manuals.
Set up your rolling checklist (leaving) and stopping checklist (arriving).
Get your sewer hoses. Get good ones.
Read through lots of stuff here on how to customize stuff. IKEA is a wonderful place for all sorts of things to work in it.
If you have not already got it, look for 1)enclosed, 2) covered storage in that order. The longer it is enclosed the longer you will go problem free. A 19 is easy to find storage for.