Well, since I entered this goal on 43 Things I have practised every day for over 30 minutes a time. Although not a jazz piano goal, I am currently trying to write a song and managed a couple of verses and a chorus. Definitely think I am slowly improving all round – am able to find more chords without thinking too much about them beforehand.
www.berkleemusic.com/ Sample one of Berklee's interactive online jazz courses for free.
Kept up the practice!