Add a "...within..." to the Quick Search Box
It might be just me...or my implementation customers, but I name the primary matter workspace cabinet "Matters" or "Client Matters", since this is where the matter workspaces go.
So, the minor problem users often have, eps. in the first weeks after a go live, is that the Quick Search Box rather often - in vain - quite often is used also for searching for matters. This since the greyed out "help text" in the search box thus says "Search Matters" or "Search Client Matters" (despite the large orange button "Go to a matter...")
So the easy fix would be adding a "...within..." to that box, resulting in "Search within Matters", etc. Which hopefully would make things more intuitive.