Make a difference to your local birdlife. Help reverse the decline in bird numbers by creating a haven in which they will thrive. It's a win-win. Provide the best shelter, feeding and nesting opportunities for them and then you can reap the rewards as they sing and entertain.
No need to be an expert gardener already, or to break the bank - many of the most beneficial features can be installed easily and cheaply, and many you can build yourself or upcycle to be eco-friendly.