Non office jobs

Hi guys,
Looking for some career advice -
I have had several "office jobs" since leaving school. I am 25 (I have just completed a part time diploma in PR & Mkting)
I have never been in a job for more then 18 months (and that was only because I was very careful about what I took, out of the frying pan and all that!) I have never been happy in any of these jobs although they have been in different industries, I seem to be happy for about 3 months & then I get itchy feet...
Over the weekend I realised that the whole problem could be that I simply dont like "office jobs". I have never really thought that there was any other option for some reason.
Apart from working in the hospitality industry (I worked in a restaurant for about 3 years on & off) what other areas would people reccomend?
I dont know where to start! I have a mortgage so cant really afford to go anywhere or do any full time course......
Any suggestions would be very welcome.

without training (and a pay cut) I can't see many options for you.
How about becoming a plumber or doing another building trade? You get paid while you train and you will earn a lot more than most office jobs.

thanks purple.......
I know thats the scary part!!
My end goal is to open my own coffee shop so I was thinking that maybe I should try and get a job as a supervisor or ass manager in one to get some experience. would the money be terrible?!