[Crowbob]

I use the tarp method for leaves. Rake (or blow them) onto a tarp. Before it gets too heavy, drag the tarp (or pull it with a tractor) to the compost pile or wherever. Dump, repeat a hundred times.

Addendum:

You can save yourself allot of work by not raking alll of them up every time you mow during the 'fall'. Leaving the leaves, etc, on the lawn won't do much damage if left for a few days at a time. Sorta like crop rotation, do a bit here, then a bit somewhere else around the tree. Plus, walnuts drop their leaves very early so you'll have plenty of time to clean 'em up before the snow flies.

Sometimes, a little uglyness in the yard is acceptable, especially when you get older.

You can also hand the rake to the wife and nicely comment how beautiful the leaves from her tree are.