I do a lot of traveling during the weekends. Now that winter is approaching sometimes the air in the tires does not maintain its psi due to the cold. Other times it's just plain unlucky flats. So, I usually have an air pump or compressor in each of my cars.

I just bought this Pittsburgh Air Compressor from Harbor Freight because the old one tends to take forever to get the psi to it's recommended pressure.
I have to say after trying it out, it's pretty fast. It's not everyday that you need this compressor but when you do I know it will do the job at an accurate rate.