Just keep up on all the basics like oil changes and don't run the guts out of it like any other vehicle.
You can see 100,000 miles without a fresh top end with ease and the bottom can make 300,000 or more without a hitch from what I'm told.
I bought my 2000 Classic new on 1/15/00 and still riding it 12+ years and 170,000+ miles later. ............seriously...Im impressed. Any special hints to keep her happy that long?