So the first thing to destroy is your hardrive so turn off your laptop, REMOVE THE BATTERY, unscrew the bottom, grab your SSD or HDD and yoink it out. if you have a HDD, find a way to get inside the HDD and scratch the disc in it up. if you have a SSD or have already done the step for HDD users, look at the next step.
The 2nd thing is to grab your matches, lighter liquid, ssd or HDD and SledgeHammer. Go to your area (make sure it's concrete!) and slam the laptop and ssd/hdd onto it, hit them with the sledgehammer, sweep any parts that fly out into your pile o' parts, pour lighter liquid, light a match and then set the laptop & SSD/HDD on fire. If you forgot to remove the battery at this point, may Darwinism take you.