Best thing you can do to improve productivity is to go and do 1 of 2 things. Go take out a big fat loan that you can barley afford or go and buy something that's going to eat up a lot of cash. Either way the additional obligations will really help your focus. You will know you need to pay for this or your screwed and will get more done in less time and make more money.
This method will not work if your a compulsive spender, if this describes you do not try this (you already are in to much debt) it wont help