Reducing Online Noise

Recently I've been thinking a lot about all the online activities which distract me from getting some work done. Things like news sites, facebook, twitter, IMs and other things here and there. Ubuntu does a pretty good job of reducing some of this for me. It seems that this will only improve with the next version and the new Unity UI. Gnome 3 seems to try similar things. I've come to the conclusion that I want to do some of the following things:

• Restrict my social site activity to only once or twice a day.
• Same for news sites.
• switch off most IMs during the day.
• set some times where I'm 'allowed' to do that online stuff (like lunch-break, evenings)
• make it harder to get to the pages by making them less visible

the problem with all this online activity is that I'm now used to this distraction. I'm searching for it. I seem to not be able to focus on a task for a longer period of time in front of my computer. It feels like I'm always missing something. I hate wasting time and thats why I'm so frustrated about this. I guess it's going to be hard to overcome this urge but I hope I manage to do it and finally get things done at home ...