I think the best way is to forget about racing people and just find territory that's fresh.
The most terrifying thing I can think of is being alone - and I mean utterly alone, like no one else in the world alone - at night. That's the nucleus of the first story in my collection and it's also where the title came from for the book.
Methamphetamine is a hideous drug. Meth makes a person become paranoid, violent, and aggressive - making them a serious threat to society and law enforcement. And maybe more importantly, meth users are a threat to their own children and families.