Poorly self taught. Have been making websites from about '97, had millions upon millions of visitors, yet total earnings will be less than what many people earn in a few months here.
With hindsight I would have kept all the domains I ever purchased (Some of them still haunt me at night) and kept certain projects open, even if it didn't mean updating them. I once had a holding page with xx thousand unique hits per day simply saying "We are closed for business". Cute, but ultimately, stupid.
Anyone want to join me in creating a time machine? I'm quite confident most people on here would do things a little differently knowing what they know now.