I was thinking about starting a thread about this, but I guess this one will do. Just a few tips...
Now that the weather is changing and temperatures are dropping, everyone needs to check their tire pressure. The pressure will get lower lower as the temperature continues to go down.
The correct pressure for your tires is the vehicle manufacturer's specification, not the pressure specification on the side of the tire. You should, however, check the pressure rating of the tire to make sure that it is not lower than the pressure spec of the vehicle. If the vehicle pressure spec exceeds that of the tire, then the tire is not safe to use on the vehicle, and a different tire must be used.
Tire pressure should be checked regularly. There is generally a 3% loss of pressure per month, (but the loss can be as high as 10%) due to air permeating the rubber composition. Stand to the side of a tire while inflating it and not directly facing it, just in case it fails. If you notice a tire that is leaking at a higher rate than the others, it should be checked for leaks.