Enclosure
I used a plastic paper and wood to make an enclosure. It was very cheap which cost me less than 3 dollars and was very easy to make modification and add new hole.
I didn't make any fancy stuff, since I want to leave it till next week when I have an idea for my pcom. So this week I just bought a lot of enclosure materials, for example, standoffs, and made a very quick enclosure for prototyping and testing.