take at least 1 1/2 hours off your crew duty to account for the time it takes to carry out warm-ups on the jet.
Dont carry out any flight control checks until the hyd fluid has warmed up and the aircraft is de-iced - place the jet in EFCS and turn on the hyd pumps to allow fluid to circulate (procedure will be detailed in your FM).
You may pop a few cbs for the Hyd pumps as well when you start, one to watch for, as the fluid is cold and more viscous.
Get packs pumping out max heat as soon as you get to the jet and close up all doors to get it warmed up ASAP
Expect to have to reset the jet a couple of times or as a bare minimum, pull and reset system CBs as previously stated, electrics dont like extreme cold!
Oh, if you have LCD, it can take up to 10 minutes for the screens to warm up and display, turn them on and just let them warm up slowly. You may think they have failed, well they havent!
When you taxi off, check for wheel rotation - brakes may have froze on.
parking up the night before, check oxy system and especially toilets are purged of fluid or you can get split pipes. Not a pleasant thing to find.
Consider removing and storing batteries in a warm location so that you can get the damn apu running in the morning. Consider taking a charged spare battery or two.
Oh, Temperature Error correction (of course!)
Just my two penneth, most flight manuals have extensive sections covering the above, worth a solid study BEFORE you get there!
Oh, just thought of this one - DONT OPERATE OUTSIDE THE MIN TEMP LIMITS OF THE AIRCRAFT. Especially with EFCS.