1. Until indicates the time of change of an activity or situation.
Pattern 1: verb + until + time
They waited until six o'clock.
The boys studied until midnight.
Pattern 2: verb + until + beginning of event
They lived here until their wedding; then they left.
She was busy until her graduation.
They didn't watch the game until halftime.
Start a Hobby
If reading is the best cheap intellectual pastime then running is the exercise equivalent. You can do it almost anywhere and you only need decent footware. There is always something to improve on, races to enter and PBs to beat. (Update: Read my blog post about why you should start running here)