These simple tips help them avoid getting overwhelmed—and separate the best from the rest.Credit: Hannah Bernabe / Getty ImagesPerhaps you started thrifting as a hobby, like Natalie Rickman, owner/operator of Sly Coffee and Vintage in Smiths Grove, Kentucky. “When I was young, I spent many Saturday mornings with my grandma Virginia, wandering through yard sales,” Rickman reminisces. “Virginia grew up at the tail-end of the Great Depression, and …