One-hit Wonder
Set up your own version of Freecycle at church, giving people the opportunity both to pass on things that they no longer need and to request things that they do need.
Repeating Challenge
If something breaks, fix it rather than replace it.
One-hit Wonder
Join a local LETS scheme Local Exchange Trading System), or set one up yourself.
One-hit Wonder
Observe Buy Nothing Day.
Occasional
Use Lent to carry out a shopping fast: don’t buy any stuff other than food and essentials.
Repeating Challenge
Take your unwanted clothes/goods to charity shops.