I just had a 17-year-old Less Wronger e-mail me for advice regarding the Thiel Fellowship after reading my application essay from last year when I was 19. We had a long instant message conversation where I gave him a lot of advice which he seemed to find highly useful (my biggest piece of advice was to start teaching himself programming using Learn Python the Hard Way, shamelessly asking for help using a pseudonym on IRC channels, forums, and Stack Overflow if he got stuck).
It seems likely that there are other Less Wrong users who still live with their parents who could benefit from life and career advice. I'm especially interested in reaching those who see reducing existential risk as a major life goal.
A related idea is for people who have some goal they want to achieve, like having a romantic relationship with someone of their preferred gender or being admitted to a prestigious graduate school, to pair up with someone who has accomplished that goal.
So if you're a young person who would like advice, an older person who would like to give advice, a person who wants to accomplish a goal, or a person who has accomplished a goal and is willing to help others accomplish that goal, consider leaving a comment on this post so you can find your counterpart.
I realize this post is a bit open ended--consider it an experiment in tapping Less Wrong's social capital in a novel fashion.
One thing I've noticed is that my behavior depends to a large extent on where I am and who I'm with. For example, when I went off to college, I learned to be much more patient and tolerant when dealing with other people. However, when I went home to visit my family, I fell back into my usual ways of finding my younger siblings annoying, and even snapped at a friend I had made in college during an IM conversation.
So you might try making a point of working hard whenever you're in your dorm room (or your school library, or wherever) and try to establish working hard as a conditioned response to being in that place.
When it comes to wasting time on the Internet, I recommend you use a website blocker like this one that allows you to do regular expression blocking. This allows you to block a website's homepage only, while allowing you to do specific things (like search for something you read) which are probably okay. (Example: reddit.com/?$ should block the Reddit homepage only.) It's not actually all that painful to remove addictive websites from your life entirely if you replace them with nonaddictive breathers like Hulu. (Don't underestimate the importance of rejuvenation. To be productive, a good goal is "distraction free work and guilt free play". If you feel guilty when you play, playing may not actually served as a relaxing activity for you, which could make it very difficult to regain energy.)
My number 1 self-improvement secret is to spend time every evening thinking about how your day went and planning out the next day. You can even keep a queue of productivity ideas you have read about and try one out each day as an experiment.
A more general version of this is to "reset" yourself using the following procedure: notice that you're being unproductive, plan a break and a detailed work strategy, take your break, then execute your strategy. I find myself "resetting" constantly, to the point where I no longer see myself as controlling my life and only as periodically shifting the steering wheel in order to stay roughly on course. (The evening planning session is a special case of this because the break is sleeping for the night.)
I'm sending you my Skype username in a personal message in case you want to chat further :)