Gen Z, stop Venmoing your friends over half-eaten avocados and follow these 2 rules instead

mihailomilovanovic/Getty Images This post originally appeared in the BI Today newsletter. You can sign up for Business Insider's daily newsletter here. Splitting the difference Most people settle their taxes in April. I used to do a bit of accounting every Sunday morning. My weekly routine wasn't with the IRS. Instead, I'd settle up with a hodgepodge of friends I crossed paths with over the weekend. From Uber rides to rounds of drinks to late-night takeout, there was always some combination…