When selecting the items to go with your, think of what work you have in process or what you would like to do. Wire work is perfect for travel. I've made countless bracelets, earrings, and wire-wrapped links for chains on the go.
I start with a beading mat. It's going to keep everything from rolling around on a table or I can work directly out of the case.
From there, I start to layer. I keep the tools in the bottom section, as you can see, you can get everything you need. I take a small bench block, chasing hammer, chain nose pliers, and flat nose pliers, bent nose pliers, looping pliers, flush cutters and needle files. This will take care of all of my wire forming needs.
Pro Tip: You can tape a ruler to the lid, for easy and consistent measuring.