Based on the average distance from the Sun (93,000,000 miles) we travel 254,620.12 miles per day on our orbit around the Sun. That works out to be 10,609.17 miles per hour, 176.82 miles a minute, or 2.95 miles a second.
This only accounts for our speed due to the Earths orbit around the Sun.
We are also spinning as the Earth rotates. The Earth makes one orbit per day. The circumference at the point of the equator is
24,902 miles. So, if you lived at the equator, add an additional 24,902 miles to the 254,620.12 miles per day going around the Sun to get the total distance you travelled in a day. That would be 11,647 miles per hour - 3.26 miles per second.
I think it is a safe estimate that we in San Francisco are travelling 3.1 miles per second. Now, if only I got a penny for every mile I went...