For most pointless stupid accounts like forums and game accounts for non-MMO games I just use a short number + word password that is very easy to type and remember.  Not incredibly secure but I don't really give a shit if someone hacks them.
Then I have a standard "secure" password of multiple characters and numbers and non-words, and while I know it's a bad practice but I use this password for multiple sites.  I believe the risks of using the same password many places is less than the risk of being forced to write down the passwords and possibly losing them.
Accounts with actual direct or indirect monetary value are secured in a greater way.
WoW uses a standard password, but also requires an authenticator.
My banks use a different password, and additionally require other information if I haven't already logged on from a given computer.
My google account, because it can be used to reset my other passwords, has a completely different and more secure password than other sites.
And for maximum security, things I don't even need to log into regularly, I create a completely randomized password and I don't remember it or record it in any way.  I simply reset the password if I ever need to get into these accounts.
And...
	
		
	
	
		
		
			You could also try using words, like correct-horse-battery-staple
		
		
	 
That is what i use to encrypt my bitcoin wallet.  It's a nonsense phrase of 8 words including a made-up word that I have used for years and will never forget but a computer won't have in any dictionary.