For me I would have to say its installing scripts, I mean I've built "award winning" web sites etc, however installing scripts myself (I'm not talking about those pre-installed scripts like Fantastico that a lot of web hosts offer today)
I remember trying to install John Delavera's OTO (One Time Offer) script years ago (among the many script installations I've tried) way before oto's were as popular as they are today. I reached the point where I built the Mysql database and put it all together and then KA-Boom nothing
I give up, next time, I'll just pay a professional.
P.S. What's Yours?
