Great advice posted so far...
Mine would just be the old adage... "If at first you don't succeed... try, try again!"
Too many webmasters try one thing and then just quit - sometimes you just don't know what your niche in the industry will be. I advised this one newbie a few years ago to just start building sites in every niche - something to cover all bases, you know... and he found out about 1/2 way through that he converted tranny sites better than anything else. It was something he had no personal interest in - but he just had a knack for it! In fact - his personal fetish was ethnic girls, mainly Latinas - but he couldn't sell a Latina site to save his life. lol
What's your thing? You might be good at running a link list - but bad at making TGP galleries... you'll never know until you try!