Hi Anne-Marie,
I sometimes think a "how to navigate the site" would be really helpful to new members. I think when you are new it can be confusing as to where your posts appear for eg your blog or to one of your groups. Also if they have their profiles set to private as to "who can read their posts" then they may not realise that nobody except their contacts, for which newbies don't often have many, can see their posts. I also think that some new members may not get that "my feed" doesn't necessarily contain general posts, only posts from their groups.
Maybe every few weeks as a featured post there could be a "how to navigate post" or even have it set permanently somewhere (not sure of the logistics of that.)
Just a thought.
Paula :)