What if you stopped thinking of your backyard as a tiny bit of lawn, trapped by a fence, and instead began thinking of it as an outdoor room, with dirt for a floor and the sky for a ceiling? This is an approach that works particularly well for townhouse backyards, and it can work for you, too. Here's a little inspiration.
A worktable that could double as a backyard dining table. Leftover decking material became the table top. Purchased 4 2x4's and also pick up 4 pallets (they are free). After cutting them apart, the 2x4s from the pallets became the table legs and the 1x4's & 1x5's from the pallets became the shelf underneath. Could even refinish it and bring it inside!