The Seattle Times’ Project Homeless is supported by Campion Foundation, Raikes Foundation and Seattle Foundation. The Seattle Times maintains editorial control over Project Homeless content. Selling newspapers for Real Change for 16 years, Harlan Wood said he’s learned his business is all about customer service.  Rain or shine, he’ll be outside the Wallingford post office, leaning against the mail drop box, with a trucker hat and blue reflector vest, country music streaming from his phone in his front pocket. He politely greets every person going in and out of the office, joking around with the regulars.  When a man asked for change, Wood pointed to the Real Change masthead on the newspaper with a wink. “There’s your change, right?”  He’s become enough of a fixture that people will call when he doesn’t show up. So anything that disrupts his relationship with the customers makes him nervous.…