How much of your day is productive?

I graduated in May and am working at a small company, one of 3 ME’s. The other 2 have been here like 30 years, so I don’t really have anyone else in my situation to learn from. I often feel like I have nothing to do, some weeks I’ll get projects but other times it feels like I’m not really needed.

How often are you guys actively doing work, versus walking around/talking or goofing off on the internet? I get tempted to just browse Reddit for hours