There are tons of blogs with DIY tips on the web, but they all aren't as simple as they seem. Especially if you're trying to print on wood with wax paper.

This one is pretty straightforward. All you need is some sanded light-colored wood, tape, wax paper, scissors & credit card.

The instructions are as follows:

Cut wax paper to printer paper size.
Reverse the image and print on the paper.
Place the image wet-side down, hold it in place & rub the ink down into the wood.
Remove wax paper & spray with wood sealer if preferred.

This is all fine & dandy, but doesn't work in practice. Multiple attempts of sending the wax paper through caused annoying jams and ink smearing. It appears you need a printer with a direct feed, or else you'll have our problem. One print managed to get through without being destroyed, and here's how it turned out:

Just our luck; way less than satisfactory.

Next, we cut the wax paper big enough so the edges can be folded around a piece of regular paper and taped. This one yielded the clearest results with no ink smudging, but still wasn't worthy of attention.

For the last attempt, we cut a piece of wax paper 8.5" x 11" and taped it directly on top of a normal piece of paper. Again, we had a result that was mediocre at best with more printer smudging: