like for me, I like checking these messages on this board, but i will only let myself check the messages or write a message, once i have achieved a 30min of productive time, and i am having a 5minute break or whatever. (i've stopped facebooking and emailing, but i find comfort in this message board, because it's nice to know i am not alone in this)..
or I really like watching greys anatomy. but i will only let myself watch an episode, once i have accomplished X number of "productive time" but it has to be an accurate amount of time, you have done "working" and not just idly sitting at your desk staring at the computer.. and usually will only let myself watch it after a full days of work, say after midnight