If you are not already signed up for badges then sign up and connect all your social media (I think FB + twitter) and tweet/post about JetBlue through them, you will get a couple hundred points from this. Also visit the badges page 10x for some more points. Even these might take a couple days to post.

You can also get like 700 points for signing up to do surveys, I have not tried this myself.

If you absolutely MUST take this flight on points and can't scrounge them up then you might have to suck it up and buy 1000 points from JetBlue for $37.63. At least if you can use the plus card to get 6x points on $37.63 you get 226 bonus points later.