Here’s the first thing you should do on Saturday: Fill a paper bag with nonperishable food and set it by your front door.Volunteers will hit the streets beginning at 9 a.m. Saturday to collect thousands of pounds of food for local food banks. It’s all part of the 27th annual Interservice Walk & Knock, the county’s largest food drive.Canned meats and fish, beans, peanut butter, rice, soup, cereal, elbow macaroni, powdered milk, baby food, diapers and toiletries are all welcome. So are cash donations. All donations stay here in Clark County.If you miss Saturday’s pickup, take your donation to any Clark County Les Schwab tire dealership or McDonald’s restaurant during business hours. Riverview Community Bank is collecting canned foods and cash donations through mid-January at all 10 of its Clark County locations. Sterling Bank (formerly First Indy) is a collection site, too.To sign up as a driver or food pickup volunteer, visit walkandknock.org or call 877-995-6625.