towing checklist?

[bjo]

I dunno if this should be a sticky, but what are some things that you need before you tow? I am picking up my uhaul trailer tomorrow to tow my M3 on Sat. morning and I want to make sure I am not forgetting to do anything.
I have the following
1. OEM hitch with ball/tongue. properly torqued
2. 7 pole to 4 pole adapter.
3. 4 t-hooks
4. 4 8' 10k lb ratchet tie downs.
5. X5 checked over( oil changed,etc)
6. patience?

anything else?
do you all bump up tire pressures? mine are set to 36/39.

I am only towing 160 miles round trip over mostly flat land.