Trouble Sleeping

I think that adults and teen like myself have so much trouble going to bed at a reasonable hour and waking up early is because of technology and all the work that we have to do. I know that I work and hang out with friends after school usually starting my homework around 8 or 9pm at night every night. I am almost always up at night till around 11 or 1130 and sometimes 12 because I am texting my friends, IMing my friends, or video chatting with my friends. I also find that if I were to try to go to bed at 9pm or 10pm, I just wake up earlier like around 4 or 5. So I usually stick to going to bed at 11 or 12 because I can't sleep any earlier. I have one friend who does go to bed at 10 right around the time I'm taking a shower and she doesn't seem anymore refreshed to me. I think that it's what you get your body used to because I'm used to getting around 7.5 or 8 hours of sleep every night. My dad, I know, cannot even operate unless he has at least 6 hours of sleep which isn't a lot. He often stays up till like 1 or 2 am getting up at 8. I cannot do that because I have school and because I can't operate without at least 7.So many people, including myself, have trouble sleeping and I attribute that to technology, homework, and work.