I would seriously recommend forcing yourself into some time limit.
Let's say, browse gbatemp because of browsing only 2h a day.
Unless you have some specific goal, like e.g. you are writing some program and want to receive feedback, or are organizing some event, or you accorded to meet someone or do something, etc.
Use your time better, set goals that interest you, try to achieve them.
Learn things that you want to learn, and later apply them (but something that you decided and set as a goal, don't tell me you learn things browsing aimlessly because even if it holds some little true it is BS).
Go out, do things, etc.
Of course, I recommend all this but I don't do it myself.
In any case I can say that I could use my time better, but it is not only because of gbatemp.
I manage my time horribly, and end up spending too much of it on vices that are not really productive.
Short story, try to learn effectively (not like me) how to manage the obsessive behavior that makes you sink time that may be better used in a different way either for achieving enjoyment or knowledge.