The short answer is- EVERYTHING!
My 88 Station Wagon diesel is my only car- it gets used every day for the 30-mile round trip to college and back, it carries my mountain bikes and sailing dinghy about, it tows a horsebox, it's used for collecting logs and coal, carting people about the county, jump-starting flat batteries (hand throttle comes in handy there, especially if it's a big tractor battery), and last weekend it was even used for levering 40-year old tyres of their rims (drive the Landy over the end of the lever-bar, it work's a treat!).
It gets off-roaded an awful lot as well. Where I live (a steep hill surrounded by hills), there are loads of 'roads' that havn't been re-tarmaced since the 1920s and have become little more than bumpy, muddy tracks. The SIII is great for 'short cuts'. I also do proper green-laning whenever I get the chance and the occasional blast around a quarry or off-road site.
Great car.
Jack