I've recently had my credit card compromised (annoyingly I was overseas at the time) and I see the Linkedin have managed to lose 6.5 million passwords into the hands of hackers.
If you, like most, use one password (or simple variations of it) for amost everything then you must expect hackers to access your email, bank account, investments, work related material, personal secrets, whatever and you will be hard pressed to get your identity back.
At the very least you'll find you have bought stuff for delivery who knows where and that you won't ever see.
Perhaps worse than using one password for everything is to keep a paper copy next to the computer. Isn't this like keeping the key attached by a string to the safe or having your PIN number written on your credit card?
Today this is inexcusable. You need a password manager that stores your passwords and automatically recalls them as needed. The best password managers will also automatically fill in web forms. The good ones will also allow you to access the passwords from your smart phone, tablet, laptop, whatever.
There are a range of good ones - simply Google "password managers". It'll cost you $20-$30 but the savings in time and grief will be enormous.