Buy the
Screen Dimm App. It will help with some of the glare not to mention battery. It's a must have for night reading.
If you're going to read Kindle books then you need the File Expert app to help load books if you use non USB methods like Dropbox or LAN.
Other then that I can't think of anything.
Read the stickies in the forum here. They have alot of good info.
Congrats on your Fire!