I didn't want to spend £150+ buying a shed, but need somewhere to store bits and pieces, sit and have a cuppa, shelter from the rain and (most importantly) have a pee in private.
Fortunately, I was able to scavenge wood from work that would have been skipped as we had nowhere to store it. It started life as an art installation by artist Natalie Gale called Purpresture, which is a medieval word for a dwelling in a wood.
http://uosfoundation.wordpress.com/2011/07/17/staff-research-natalie-gale-charter-of-the-forest/, lots of ply 10mm thick and in handy 8ft x 4ft sheets, this was transformed by my wonderful OH in to the fantastic shed pictured below.
A final coat of shed preserver and it's finished. Not exactly a dwelling, but a brilliant shelter and store - can't wait to start filling it up.