Blowing out the candle, when your house is on fire 

Focusing on a less relevant or less important task when something major needs to be done.

Delaying the inevitable

Sarah: "Isn't you final year project due in for tomorrow?"
Robert:....yeah
Sarah" Then why aren't you working on it?"
Robert: "I'm checking UrbanDictionary..for a laugh"
Sarah:" You have to stop blowing out the candle, when your house is on fire dude"
Robert: "What does that mean?"
Sarah: "Check it on Urban Dictionary"
INSERT VICIOUS CYCLE

Blowing out the candle, when your house is on fire by hungryangrybill March 16, 2011