Diesels with DPFs and cats do suffer from short journey operation but a periodic Turin Tune-up does wonders for any car that's used in this way - follow Waynne's instructions above.
There's a bit of a myth about cold start engine wear which I'd like to unpick here. Undoubtedly engine wear is greater on cold start than when running at correct temperature but modern synthetic oils reduce this to about 1/20 of what it would have been with traditional oils. Simply on account of their ability to flow properly when cold.
Don't ever load up a cold engine, whether with high revs or with wide throttle openings - diesels don't actually have throttles, of course, but the advice is the same. Take it gently at first.
From what I understand the cold start engine wear is not so much the problem as cold stop engine wear. When an engine is warming up there are volumes of acidic gases which, together with condensation, form some fairly corrosive acids which can etch away at the engine's internals over time. Obviously if the car is driven until it's fully warm then the water vapour and condensation is not a problem because the water evaporates fully and leaves via the exhaust.
So stopping your car after 2 miles leaves it parked up with the engine full of corrosive acids. This is why cars that do 100+ miles every day will last for several hundred thousand miles (even though they might still cold start twice a day) and cars that do 2 miles only, twice a day, suffer from accelerated engine deterioration.
Diesels are slightly less prone than petrols in this respect and the diesel combustion by-products, although sooty, are not anywhere near as corrosive as petrol engine combustion by-products. The soot, however, is what will eventually clog the DPF. Hence the periodic clean up 'run'.
Using a fully synthetic oil is always going to be better than a mineral or a blended oil in my opinion, though this will not control the pH level of gases and vapours retained in the engine.