Respected commentator on security Bruce Schneier wrote:

Simply, people can no longer remember passwords good enough to reliably defend against dictionary attacks, and are much more secure if they choose a password too complicated to remember and then write it down. We’re all good at securing small pieces of paper. I recommend that people write their passwords down on a small piece of paper, and keep it with their other valuable small pieces of paper: in their wallet.

Original source

I like this advice, and follow it myself for some passwords, although sadly I need more passwords on a regular basis than fit on a piece of paper small enough for my wallet.

I use a password manager for some, but not all of my passwords. For the ones I don't want to put into a password manager I print out a page like this and keep it safe in my home or around my person. I find it easier to print a page of pre-generated passwords and fill in where I use them rather than generate them in the browser and copy them out to the paper.

Recommendations for use:

• Select an 8-, 10- or 12-character password according to the incentive for an evil person to brute force it, and the cost to yourself if they do. Each character contributes 6 bits to the cost of brute force discovery. Don't use an 8-character password for anything in the least important.
• Because the passwords are randomly generated, they won't always have the mix of character types a site may require. Remember you can always add extra characters using a ballpoint pen.
• It's up to you what you put in the date and context columns. Be explicit if you need to and trust that you will keep your paper safe. Be cryptic if you prefer to, but still be careful with the paper.
• This page is self-contained - you can download the HTML source using your browser, and run it from your local filesystem, and change how it works if you want to.
• If you need to know whether this page is secure enough to use safely for your application (whether it's logging in to the gardening club or running a nuclear power station), get someone appropriately qualified to inspect the web page source. I can't tell you whether this is good enough for your needs.