I've read as well the indicated thread but there's still one or two points I think are worthy of mention. I apologise if it's a case of grandmother and suction of eggs, but anyway -
as diesel gets colder it passes through a "cloud point" to a "waxing point". This can be just a degree or two below freezing depending on the quality of the fuel.
It's the waxing point that you need to be careful of.
But first -

Battery.
Make sure it's in good condition and all connections are clean and tight. The colder it is the worse it is.
I've had to resort to taking it to bed with me to keep it warm. I've also had to warm it up by putting it on top of a pan of boiling water on my stove. I've put it to sleep overnight with a blanket, a hot water bottle and my teddy bear. I've seen people pouring boiling water over it to warm it up, but I'm not sure that's a good thing.
When your battery seems dead and unresponsive, wait and warm it up (funnily enough it seems to work with my wife as well)

Fuel lines - maybe insulate them, definitely try and run them in places out of the wind and/or near the engine. Make sure there is no water in the filter or lines (obviously it will freeze and block it all up). If you're running in very cold weather and the engine stops, you try and bleed it but no fuel comes through, often the filters clog up first with the wax. I've used a blow torch to warm them up (only metal cased filters). Then try and bleed it again. I've also changed the filter for a new one at the side of the road, kept the old one until it thawed out, rinsed it out with clean fuel, and then re-used it.

Oil - make sure you are using the right grade of oil, especially with a turbo motor. Not good when the oil is too thick on start up and the turbo doesn't get it's fair share.

Park at night out of the wind or at least arse on to it.

Starting - mentioned before was an aerosol to help recalcitrant engines (I know it as "Easy Start"). It does help but anecdotal evidence suggests if you use it a lot then the engine doesn't seem to want to start at any other time without it. Don't know if there is some technical reason for it or even if it is true, I just know I've had diesels that wont get out of bed without it.

Better idea for starting on cold mornings - oily rag soaked in diesel, held in your barbecue tongs, set alight and put close to the air inlet so that the hot gasses are sucked in when you turn the engine over.
Maybe understand or practice the idea of turning the engine over using a rope and jacked up rear wheel for when your battery is really dead.

You can put a percentage of petrol in your diesel to lower the waxing point. It is debatable as to what percentage is acceptable and it is better if you don't use it at all. What I do know is that for a short period of time (85 km's) I used a mix of 25% to get me out of the sh*t. Definately not recommended.