Get out there and put some mileage on, is the answer.
Exactly right Dave. Mine ticked over 128000 miles on the way back from Scotland last week. Mind you, one thing I don't have to worry about is its resale value. What with the high mileage, Vauxhall engine with aftermarket ECU, fibreglass wings, non-standard suspension, I doubt if it would fetch £15k even though it goes like a stabbed rat.
Tim H. 1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
