I run a website teaching people how best to earn miles. These are the 7 worst mistakes I see consumers make with their credit cards.

Dave Grossman runs the website MilesTalk, where he explains how to maximize points and get perks like two-for-one US airline tickets for a year.

https://www.businessinsider.com/worst-credit-card-mistakes-miles-rewards-points-tips-expert-spend-2023-12