Go Tradition unless you are a Civ that is geared towards Liberty (Poland comes to mind, but other Civs with good UBs like Maya, Persia will work too)
(Assuming Tradition) Value food above all else, even production, in your Capital after you unlock 4-food farms.
Any war before Artillery will most likely only be won with the help of Great Generals and lots of luck.
Convert all farms in conquered territories into trading posts to control growth in puppeted cities.
Make sure you get at least a Hotel in your capital if you are getting pressured.
Agree with most of what you wrote, but disagree with the above recommendations.
#1) Liberty is *almost always* more effective for domination because of a few things.
The benefits of Tradition do not apply to your puppeted or annexed cities. The benefits of Liberty do.
Reduced tile improvement time is super-effective. If you can get Pyramids (which you should definitely try to get) you can pillage-heal your front line units in one turn, which is insanely powerful. And more importantly, you can get farms, mines, etc. up faster, which really helps early on.
To control unhappiness, you want only the population you absolutely need. Tradition is designed to grow 4 cities fast. Only your capital gets the happiness bonus from Monarchy, so any other city you build is detracting from your overall happiness during Domination.
That being said, Tradition can be really effective. If I do go Tradition for DV, I try to maximize population in my capital and stagnate my 2nd-4th cities while they produce things.
#2) I would say value food above all else even before you get 4-food farms. But you need the mines ready to go when you start your domination run. Don't neglect them!
#3) I disagree that you can't (or shouldn't) fight early wars. Just don't take cities. You can maybe take one capital, but the goal of your early wars is XP for your units. You can get double-tap units or XBows with Range if you keep a neighbor in perma-war until you're ready to start your domination run.
#4) Re: Trading posts. I somewhat agree, somewhat disagree. You have to have a lot of workers for this to be feasible. It's faster IMHO to pillage the farms before city capture with horse units, and then move on. With Liberty/Pyramids, maybe you have time to build some trading posts, but realistically, you need to *press on*, and you want your workers near the front lines. Resist the temptation to save farm pillages for the units that need them and just pillage ALL farms with horse before city capture.
But, and here's the kicker, except for capitals, you should only be keeping cities temporarily unless they provide some huge advantage. I keep them long enough to move my units to my next target and then I sell them to someone I have open borders with. Always move the great works out first and check for wonders. Accidentally selling Petra = major oops... ;-)
#5) A hotel in your capital does what exactly? Tourism doesn't help with ideological pressure. Culture does. Why do you even have Refrigeration unless all your oil was coastal?
EDIT: Ok, that's not quite accurate I guess. AFAIK, Tourism helps you pressure *them*, but culture defends you from their pressure. So Tourism is only useful for CV. Have I been looking at this all wrong??
Post-patch Tourism will be more useful. (Your level of influence on AIs will give you other benefits) But right now, AFAIK, the only value of Tourism is CV.