If you want a rule of thumb, 40 percent of the cost of putting in a new application is integrating it with the other applications.

A good rule of thumb

One rule of thumb is for every degree you set back the thermostat, you save 3 percent on your heating bill. That's assuming it's 24 hours per day. If for eight hours of sleep and eight hours of work you set back the thermostat 3 degrees, that's a savings of 6 percent.

I'm throwing good, my thumb is 100 percent,

It’s hard to guess how smart the machines are, but a good rule of thumb is that they’re always smarter than you think.

It's a rule of thumb for me if I'm at second when he has the ball I try to go for three.