When creating a new Seed, always double check its validity. Not only by writing it down and double checking it with your own eyes. To me, even if the Wallet checks two or three words, it means nothing. There could always be an error and I try to minimize it.
When I create a fresh wallet and I'm copying out the passphrase, I'm always mindful of word spellings. You know the word, "colour" isn't spelt that way by American. It's "color" for them. That difference can lock one out of one's wallet if a single word isn't put in its right place, either by spelling or sequence. I'm always meticulous whenever I'm downloading or registering stuff online. I put every other thing on hold until I'm done. That way, I haven't been a victim.