I use this: http://www.amazon.com/gp/product/B00006IC2T/ref=oh_details_o00_s00_i01?ie=UTF8&psc=1 Put a small strip on my dash (which is black so it matches) and a small strip on the back of my phone case. I use it for MP3 players & Phones works great, just throw it on there and it won't move. Plus there's a lot of other uses

I took the stands off from the monitors so they'd lay against the wall, and then used these in conjunction with this to secure them.

I got the Velcro from Lowe's for $6.99 I think, and I just cut it into as many pieces as I needed to stick everything up. One square inch of it holds 1 lb., so you only need a few patches on the corners to hold everything up. I put some of it on the "L" Brackets as well - they're screwed into the wall behind the monitors on the bottom, and the edge of the monitors just sit on them (stuck there with Velcro). It's all really sturdy.