Press G, then the first letter of where you want to be. G then C is Clients, G then T is Tasks, G then H is the time you have logged. It works from every page, so moving between a client, their tasks and the time spent on them takes a moment, not a hunt through the menu.
The keys follow your menu. Each person only gets the places they can use, so nobody presses a key for a page their role keeps them out of.
