When we first moved in and the trees were much smaller we used to just put all the leaves in black bin bags and pile them up for a year. That didn't work too well, oak leaves don't decompose quickly. So we put them through the shredder to break them down first, which worked a bit better. The next year we shredded them then left them for two years, which worked very well. But by that time we had ten black bags to store each year so we piled them as well as we could near the shed and ended up with rats and mice setting up home over the Winter in the nice warm leaves. We did see a fox nestled down occasionally, which was nice, but the bags had to go because of the rats and mice. We still shred a few bags and leave them to rot in the garden each year. Then there are the acorns and the hazel nuts to gather up, and next year all the digging out of oak trees and hazels ... I'll never buy a house again with so many trees near by.