My sweetheart travels a bit for work. And when he travels, his laptop is his constant companion. Things like jumping in and out of taxis and being shoved under a seat for takeoff and landing, not to mention daily trips between work and home, can do a number on a laptop if it's not properly protected. There are plenty of padded laptop sleeves on the market made of things like neoprene. Bo-ring! And so not personal. A nice fulled laptop sleeve is a cinch to make and is a nice reminder of home.  Here's how.
 
I used two full skeins of Lamb's Pride Worsted (it fulls like a champ) in M-03 and M-04 grey heather and charcoal heather, plus about 30 yards of M-22 autumn harvest and about 3 yards of M-14 sunburst gold in the same material. These specs are for a 15" MacBook Pro, but you can easily make adjustments if your laptop is a different size.

 
Total warp length: 74" (based on 30" loom waste - yours may vary depending on your loom)
Total warp width in reed: 17"
Sett: 8 ends per inch, 136 ends
 
I thread my loom for plain weave using the following color sequence threading left to right:
32 ends alternating charcoal and grey
2 ends sunburst gold
12 ends autumn harvest
2 ends sunburst gold
Thread the remaining ends alternating grey and charcoal until you have a 17" weaving width. I alternated two picks of grey heather and two picks of charcoal heather to create a bit of visual interest.
 
From here your execution of the plaid can be planned or improvised. I created a wide plaid on one side and a narrow plaid on the other simply by increasing and decreasing the number of ends of autumn harvest used. You can expect to lose about 25% of your fabric dimensions once fulled when using this yarn, so I wove until I had about 40" of fabric. If you want to create a flap, simply weave more material. This will require additional yarn.
 
I zigzag stitched the cut edges, and put my material in a full washing cycle with warm water (we have a top loader). Once dry, I steam pressed the material and got out my sewing machine. My fabric was reduced to about 12" x 31" plus some fuzzy edges (just about the 25% loss in measurement I hoped for). Using a square and a rotary cutter, I trimmed the fuzzy edges. I ran a zigzag stitch across the cut edges as a precaution (you could match your thread to the plaid for effect), folded the material in half, and stitched up the two sides. Voila!