One of my friends donates hers to needy local charities. Lovely idea I think.
Some of my Premium Prize money has been donated to the local Community Cupboard. That is similar to a food bank, but take fresh fruit, vegetables, dairy etc, that is close to its sell-by/use-by date. They are pleased to receive money donations so that, for example, they can purchase special baby formulae.
I also donate to Kiva.org which provides interest-free loans, and advice to people worldwide. When the loan starts to be repaid, I get credited with the repayments, to make another loan. Approximate ten per cent of recipients go into default.