This is not official advice from any company. Just something I've been considering. Feel free to let me know if you see any problems with it or if you have a better suggestion.
To create a good password, you want a reasonably long length, upper and lower case, even numbers and punctuation. But you don't want to use the same password for every site. Considering the number of sites a furry goes on, it is literally impossible to remember all of those. Now browsers store passwords, and password manager programs exist. But what if you're always switching from computer to phone to tablet, or not using something that allows saved passwords?
Before I continue, yes I am aware of the xkcd comic http://xkcd.com/936/ -- even if you do this, you can't remember a unique password for every site you visit.
So write your password down. What!? you ask. With certain caveats I believe the risk is negligible:
1) keep it on your person at all times, like your wallet. You already protect your wallet.
2) if someone looks at it, they won't recognize it as a list of passwords. Maybe it looks like a list of phone numbers or addresses and the "phone number" or "address" for "Frans Abernathy" is actually your password to Fur Affinity. Maybe it looks like a list of directions and "Turn left after 14.8km on Furi St, BC" actually tells you that your password to BC Furries is "Turn left after 14.8km"
3) Mix it up so that even if someone does get your paper, they won't figure it out before you change your information. Maybe the "phone number" is actually what you type, or maybe it just reminds you of a word based on the letters for numbers on a telephone keypad. Maybe you wrote it backwards, or shifted each digit forward or backward one. Maybe each password is actually for the site two lines below. Maybe there's a punctuation mark(s) that you add to the end of each one that you never write down. (Be careful that you don't forget what the mixing method is or what the punctuation mark is. If you use the same method or mark for each one it'll be harder to forget.)
4) Make a physical copy and hide it somewhere safe; you'll be glad you did.