Don't. Do you really wanna not get any good jobs just because you were too lazy to finish a few more years in high school? Nobodys telling you that you have to go to college, but do not drop outta high school.
If you do this, you will have so much idle time that depression will creep in. People younger than you will know things you don't know, and that will feel uncomfortable. It will be hard to get a job -- any job. The whole world will be moving forward while you stay still.