Although you can find good password storage tools, some passwords are used so often it's best to memorise them (and besides, there may be times when these password management tools aren't available). Of course, in these cases, you'll want to make your passwords easy to remember but difficult to decrypt, and that's where a memory device can come in handy.
For example, you may want to derive your password from an acronym that's meaningful only to you. Choose a line from a favorite song or saying and use the first letter of each word as the basis for your password. If you use this technique, make sure you mix in a few numbers or symbols for good measure. Or, take two short words with nothing in common (but that have special significance to you) and combine them with punctuation or numerals, and always remembering to use both uppercase and lowercase letters.
Avoid using obvious or common words with vowels replaced by symbols or numbers (e.g. “p@ssw0rd”, “s1m0n”). And don't use the reverse spelling of a word. Hackers have figured that one out, too. The key is to use personally significant words or phrases in unusual ways. Get creative with password composition. You may just find yourself enjoying it.