Satisfaction

Being able to resist short-term satisfaction is very hard for a variety of reasons. While I won't pretend to know the science behind it, from an evolutionary perspective, it makes perfect sense. In the past, if we decided to fulfill a short-term interest that didn't coincide with survival, such as finding food, we were quickly met with, at best, sharp hunger pangs, and at worst, death via starvation. However, we now have nearly every facet of the bottom rung of Maslow's hierarchy of needs at our fingertips. We no longer have to forgo other urges in order to feed ourselves. The food is readily available. It becomes paramount that you develop the discipline to stave off what Seth Godin refers to as the "lizard brain." It's fear that will masquerade as boredom. It's that voice telling you you have better things to do. That you can't/won't make a difference.
You have to identify what it is that causes you issues and cut it off at the pass. The internet, as great as it is for connecting us and providing information, also provides a great "escape" and avenue for sucking away time. You may have to disconnect your internet. There are even programs you can get that will do it for you at certain blocks of time that you set. You may have to somewhere that doesn't have internet access. Whatever it takes.
Plan your day. Taking the time to plan your day and then having the discipline to follow it through will make a world of difference. I don't remember which business book or blog I read it in, but one of the best pieces of advice I've seen is, "you should never wonder what to do next." Have a backlog of ideas and projects and things to do. This doesn't just mean busywork (though sometimes that's necessary). It means have your meaningful work scheduled, lined up, and ready to go, then carry it out.