A metal napkin holder makes a great stand for your MacBook when not in use.
Step 1: Get Supplies
Including the napkin holder and some round felt furniture pads.
I got my napkin holder from Target. Metal works better than wood, because it needs to be heavy enough to hold up the MacBook.
Step 2: Cut Felt Pads
In halves and quarters so they can be applied to all the points of contact. I used the halves on the bottom, and the quarters at the top corners of the napkin holder.
Step 3: Apply Pads to Holder
at all the points of contact. You don't want to scratch your MacBook, do you?
Then set the MacBook in its holder. For the MacBook Air, I put the thicker edge downward (so the Apple Logo is upright) and it balances quite nicely.