I got a Stickvise a while ago. Its a simple to use low profile pcb vise. The great part about it though is that its hackable. You can create your own jaw designs for it and attach them. The website has a hack your vise section.
I used the provided specs to make these jaws. They allow me to hold an Adafruit Circuit Playground board. This gets the board off of my messy bench to prevent any shorts. I designed it in Autodesk Fusion 360 and printed it out on my Lulzbot Taz 6.
This is the upgrades I have done to my Lulzbot Taz 4 and the enclosure I built for it.
http://www.thingiverse.com/thing:866604 – X Axis Openbuilds v-slot
http://www.thingiverse.com/thing:949082 – Y Axis Openbuilds v-slot
http://www.thingiverse.com/thing:755184 – Strengthened extruder body
http://www.filastruder.com/products/all-metal-e3d-v6-hotend – E3Dv6 Hot end
https://www.lulzbot.com/store/parts/lulzbot-taz-pei-sheet – Lulzbot PEI Sheet
http://devel.lulzbot.com/TAZ/cat_guard/ – Cat Guard (enclosure)