Personally I run a little rural convenience store, my husband repairs and services classic landrovers (and does most of the shop admin.).
As well as normal support industries (teaching, nursing, driving) we have many jobs locally associated to the high number of second homes; so cleaners, garden maintenance, building work, as well as other tourist related jobs (hotels, restaurants and shops). There are a few who appear to make a living through odd jobs on the farms - helping out with gathering, lambing, shearing, and more who work remotely - having a good internet connection is vital for this of course.
It's actually one of the questions we get asked a lot in the shop 'what do people do here?' I tell them we have a lot of midge farmers

The answer is much as they do elsewhere. We just don't have a big employer handing out a career ladder, mostly people are self employed or work for the government. Actually most are retired...