The FlyLady says:
You can do anything for 15 minutes. This is all about getting started and giving ourselves permission to stop when the timer goes off. You cannot restart the timer either. This is not a race to finish in 15 minutes either! The timer helps to keep us focused on what we are doing.
Now set your timer for 15 minutes and go gather up all the trash you can find to throw away and put it in the garbage can outside. Then set your timer for another 15 minutes and sit down and put your feet up and read a favorite magazine till the timer goes off.
I did it and it is done.