Convert the shed into a workshop and start making bits of kit out of bake bean cans and such. really I did that once I got bored watched some youtube vid on making a charcoal stove out of can and decided to have a go.....by the time id finished however it needed three people to lift it, but could boil a litre of water in 9/10th of a second or process a kilo of iron ore in a hour. I had loads of fun though and it keep me occupied for weeks