I gave up five years ago and so did my other half (2 days after me). We now have a top of the range greenhouse, wide screen LCD television, new computer, constructed 50 meters of Garden fence, power tools for the garden and best of all more money in our pockets.
I used the Alan Carr book, which has a permanent success rate of 97%. The good thing about using his books method is that it does not take any willpower to succeed.
Jax