After a couple tries, you'll have something that breaks into pronounceable syllables, insert some punctuation (there's a lot of punctuation on your keyboard besides those under the number keys) to break the syllables and you're good to go. There are many tools that generate pronounceable nonsense passwords, but I prefer this way. Another approach is to generate 5 to 8 word phrases ad-lib style (these take longer to type in, but some people find them easier to remember).