Small light laptop, messenger bag which is quick to drop the laptop into and sling over one's shoulder, and occasional OS maintenance to keep suspend/resume as

Small light laptop, messenger bag which is quick to drop the laptop into and sling over one's shoulder, and occasional OS maintenance to keep suspend/resume as fast as possible. I found that all of these factors meant that I was more likely to take my laptop with me than when I had a bulky desktop replacement in a fiddly rucksack that took ~30 seconds to come back from sleep. I also had a pair of cargo pants with a ripped pocket that was almost big enough to carry my laptop. Always meant to sew an extension onto that pocket to create a quick-draw laptop holster - the perfect thing for someone who likes to walk about while thinking and needs to take notes in a hurry ;)