After browsing several plans, I settled this one by Ana White. I liked that it didn't require any mitered cuts, pocket holes or special tools.
It was super simple and I easily put it all together. I made all my cuts with my hand saw, then used a drill to screw everything together. It's built entirely of 2x4s, so it's VERY sturdy. It's interchangeable between a coffee table and a bench. I like flexibility. I patched all my screws and large knot holes with stainable wood putty, before sanding the entire piece well with my electric sander. I used the same stain + sealer to match our outdoor sofa.
I pulled everything together with this 5x7 black and white striped rug by Better Homes & Gardens at Walmart for $49.98. I can't wait to try out more carpentry projects!