I'd do as many as I could the first time. After that point, try to do one more each day, taking a day off every three or four days. After a couple of weeks, add a few push-ups to the mix.
acceleration.
The duration of Your Friend the Rat is 660.0 seconds.
The duration of Add a Friend is 1500.0 seconds.
The duration of The Secret Friend is 900.0 seconds.
The duration of My Friend the King is 2820.0 seconds.
The duration of Her Friend the Bandit is 960.0 seconds.
The duration of Hello Friend is 660.0 seconds.
The duration of My Friend Tony is 2880.0 seconds.
The duration of My Friend Rabbit is 600.0 seconds.
The duration of Dear Friend is 3600.0 seconds.
The duration of Our Friend the Atom is 3180.0 seconds.
The duration of My Friend the Monkey is 420.0 seconds.