It's time for another case of "The Newb Asking For The Hive Mind's Wisdom." Bear in mind I have almost zero experience with optics (frankly, almost all my experience is iron sights regardless of platform), and I recently got made a too-good-to-pass-up offer on an Eotech 552 with the laser (single beam, not IR-capable DBAL) add-on, so I need to ask for you guys to give me an "Eotech Boot Camp."

1. What are the minimum add-ons and spare parts I should get ASAP? I already have a lens cover and QD adapter from GG&G on the way, and I found a compatible tape-switch on eBay. I know spare terminals/contacts and springs for the battery box are a good idea.

2. Are there any special tips and tricks not mentioned in the manual that I should know about?

3. Anything else not covered in the above two?