Addition of a 'Did you know' at the end of the Inbox page. Something small, non-obstructive that will give people hints as to how litphoria works. Most people won't look at them, but sometimes the 'occasional glance there' will teach people neat tricks. A new system can be complex, and forcing people to read it all at one time can make them just ignore half of the functionalities. Something like that teaches people things, without actually being too annoying/long. I know it works for videogames and many softwares in my case. I never ever read the manual, but those 'did you know' tooltips usually get me going nicely.