Tips on avoiding hackers on YouTube, Twitter, and E-Mail?

[My Baby Has A Hitler Mustache]

I've been hacked before, and I WON'T be again. All 'o those sites, i have an account on. Are there any good tips on avoiding hackers?
PS the last time i got hacked on yahoo, when i told my teacher about it, she showed me the password reset thing. When i got home and tried it, yahoo wouldn't allow me to do it, due to "security reasons," and now, because of those total BS sevurity reasons, i've lost an E-Mail account.
PPS You security reasons can kiss my āss.

[Dominic H]

You were probably hacked because you don't use secure passwords and/or use the same password for multiple accounts. Follow the guidelines below to reduce the possibility of getting hacked because of a poor password.