Time cards: a clock in / clock out button in the top bar. Your team can start and stop their time card from any screen, see when their clock started, and jump straight to their time cards. Turn it on in Settings → Interface → "Show the clock in/out button in the top bar"; it is off until you do.
Each team member can hide the new clock in/out button from their own top bar in My preferences → Hide menus from topbar.
Updates
The top bar button and the clock in/out widget on the dashboard now stay in step: clocking in or out from either one updates both, without reloading the page.