My Dad's system long time ago was just to trade stuff he ate or places he ate at etc. He was heavy into Dr. Pepper, House of Pancakes , McDonalds. He did a lot of complex trades with options and what not, but the stock always had to be something he was personally spending money on. It was embarrassing when I was a kid because every time we went into House of Pancakes he would tell the waitress he owned the place.
Lol, I like yer dad's style. He was not speaking an untruth about owning the place, and that sort of raw fundamental analysis probably served him well.