Tech points are gained by working in the lab. You will gain them faster with a "master" than someone who is "adept". That "adept" person will make points faster than a "trainee". If you have a runner, someone who has "running" in their "likes", they too will make points faster than the others because they are moving faster and accomplishing their task quicker.
Points are also made by collecting collectables you already have. The first time you find a specific collectable, it is not made into tech points but if you find it again and collect it, it will transfer into tech points.
There also Island Events that can affect your points too, but you do not have control over that one.
