My crappy job sucks can you help me?

What makes a job crappy?  What do I mean by crappy?  What could make your job better?  What would you do with that time in your crappy day,if you were told, during a job evaluation that: "Your performance is lacking, but, I will pay you for eight hours each day but you must create something within 30 days that would be of greater value to my company than today.  Start tomorrow morning, and, I will begin to teach you everything we do to create this product or service!"