Local Exchange Trading Schemes (LETS) are trading networks which allow local people to swap services with each other. If you have a particular expertise you can offer your services and if someone wants you to do something for them they will contact you and agree an exchange of their services for your, or you will get credits for your services rendered if there is nothing you immediately need doing. There are over 400 LETS in the UK, so there is probably one near you. To find one try LETSLINK UK.