Apart from “correct horse battery staple,” the most secure passwords aren’t words, they’re phrases. You don’t even need crazy symbols or hard-to-determine numerals (is that an l or a 1, a 0 or an O?) – just a good, longish phrase made out of words.
And now you don’t even have to make one up. Using the XKPasswd generator, based on but not associated with Randall Munroe’s amazing comic strip XKCD, you can generate secure pass phrases easily.