StopWaste recommends that you post prominent signs on or near the recycling and garbage containers clearly indicating which are for garbage and which are for recycling. Use posters or decals that contain drawings or pictures of the materials that go into each container. This helps people understand with a quick glance how to sort the materials properly.
City Specific Signage
Many haulers and cities can supply you with posters and/or decals that are specific to the materials they accept. Visit Recycling Rules Alameda County for city specific signage.