Password Setting

So many passwords to be memorized is one of my headache problems. Password protection is for personal security but since nowadays so many accounts I am using and now I am the one who confusing myself. I did try to keep all accounts under one same group of password but I just feel so unsecured. I am a silly woman. By changing password frequent the result is my email account's inbox are full of password reset request mails. Don't laugh at me as this is really a serious problem.... *sigh*

Any one has a better idea to keep track and control on password setting?