Step 1: Materials you'll need
1 Metal Mesh Document Holder (I bought mine at Staples for $6, it comes in black or sliver)
1 Roll of Anti-slip shelf liner (bought it at the dollar store)
1 Small block of rubber - This corner piece came in the packaging of my air-conditioner to protect the corners. You can probably find something similar at the hardware or dollar store such as a rubber sandpaper block; just cut the sandpaper sides off.
Double sided tape
Step 2: Cut out two block's of rubber
Cut the block of rubber into two pieces using a utility blade.
Using a glue gun, glue each piece to the corner of the Metal Document holder (Glue to the bended edge). This will prevent the laptop from slipping when sitting at an angle.
Step 3: Anti Slip Strips
Stick some strips of double sided tape to the liners and than stick the liner to the edges of the document holder. This will prevent any scratching to the laptop from the edges and hold the laptop in place, preventing it from slipping.