Buy What You'll Use

I definitely purchase stock in companies whose products my family and I use.
If you use Apple products buy shares. $Apple(AAPL.US)$
If you use soap, shampoo, conditioner, laundry detergent buy $Procter & Gamble(PG.US)$ and $Johnson & Johnson(JNJ.US)$.
Own a home? $Home Depot(HD.US)$ and $Walmart(WMT.US)$ .
Buying a companies stock that you also buy products from is just plain smart. A double return on investment especially if you're in dividend reinvestment.