Why not just do it the way I did it?

First, have aspirations to get higher education but get no emotional or financial support (i.e. don't go to university). Then get some computer jobs because you're smart, but the bosses will probably piss you off, so quit.

Then get a string of jobs in construction or some sort of industrial shop where you have to sweat a lot and do heavy lifting. This may strain your joints, and you may even be maimed or killed, but that's why you go to the pub after work and consume enormous quantities of beer.

You may develop a bit of a "gut," but you'll also be strong and muscled (and optionally bearded). Bitterness and resentment are possible side effects. Repeat as necessary.

I hope this helps!