Natural Conditioning is Powerful Stuff
It works because of natural conditioning. Recreating a situation and practicing a behavior in that situation makes it likelier that you'll do that behavior when the situation arises.
If you practice getting out of bed immediately when your alarm goes off when you are fully awake, you are likelier to do leap out of bed the following morning. It's that simple.
If you want to do work when you turn on the computer instead of reading blogs all day, practice logging on, switching to a document you are working on, actually do one or two little things that need doing and log off. Walk away, wait a minute, then walk back and repeat. Keep doing that until you are sick of it :-)
If your place is a mess because you don't clean your messes as you go, practice walking into a room and finding something that needs cleaning or organizing, then walk into another room and repeat. Do that in every room in your house until you get bored with it. Then you should have the beginnings of a very useful habit and a much cleaner home.
I'm trying these last two ideas myself and they seem to work, at least for today. I'm pretty sure you can devise similar strategies to put in place the behaviors that you want.