A 'reverse pikey' thing i do, as it were, is to leave my day saver ticket at last bus stop I use- no longer needed, so anyone who comes along next can get a free ride or two..
Apparantly sharing tickers is frowned upon, but the driver can't check who paid for it, can they...
Some spend needed, but sign up to various food / pub newsletters, with an 'internet birthday' within the next few weeks, and some send you a voucher for a free bottle of wine, or dessert etc, with a (purchased) meal..