Use a password manager for security, efficiency, and helpful estate planning
If you aren't using an online password manager, you should be.
Password managers create, securely store, and let you easily access secure passwords for all of the internet sites you use.
1) Security. still using the same password for every site? Bad, bad, bad. Someone finds, guesses, or hacks that password and you are toast. Good password managers will easily create unique, long, random passwords that you can use for each site you visit. Such passwords are more secure since they are typically unguessable and since you use a different one for every site. You can also ditch the "password list in the desk drawer" technique which is clearly inadvisable.
2) Convenience. Good password managers allow for automatic login when you go to a specific site. No more keying in user IDs and passwords or worse, searching through post-it notes to remember your login credentials. This saves a lot of time and frustration.
3) Estate planning. With one master password (carefully chosen and not written down), your spouse or other family member can gain access to your entire online world, making death or incapacity an "easier to navigate" puzzle.
Read Lifehacker's Five best password managers. (I use last pass...)
