Solving two problems with one solutions is called "killing two _____ with one stone."
What are birds?
To go from being poor to having a lot of money is to go from "____ to riches."
If you were talking about someone and they suddenly appear it is common to say "speak of the _____?
What is the devil?
If you are hanging out with a friend and do not realize how many hours you have been at their house, you would say "time flies when you are having ____?
What is fun?
If you have 3 hours before your next appointment, you may go for a long walk to "____ time."
When someone is wasting your time/taking a long time to get to the point in a conversation you could say "Cut to the _____?
What is chase?