RX300 tire repairment

Discovered the right front tire is a little low at about 26 lbs the night before our scheduled trip to Pacific Grove on 20120625.  Inflated the tire and checked the next morning, it dropped from 31 to 30 lbs, thinking it's probably due to cold night.  Drove to Pacific Grove, checked into Asilomar Conference Ground, visited Monterey Bay Aquarium and drove back, the car felt a little strange as it tend to veer to the right occasionally, checked the left front tire pressure, it became 20 lbs.

Found out that there was a puncture at the bottom of the tire on the inner side after removing it, since the Chevron station, which usually handles this kind of problem, is under renovation, I had to come up with another solution - options: 1. Check out if Chevron has a temporary shop that still fix autos; 2. Purchase a tire repairing kit and do it myself; 3. Find another tire store that can take care of this.  I ended up getting a tire repairing kit ($10) from Auto Zone after option number 1 didn't exist.  The kit includes one puncture cleaning tool, 5 repairing strings, one string insertion tool, and one tube of rubber cement.  The first string went all the way in as I could not stop in time, but the second one was inserted just right.  After removing the excess string, inflated the tire to 31 lbs, the tire was checked and, voila, no more leakage.  I then rotate the tires according to the manual - right front to left rear, left rear to left front, left front to right rear, and right rear to right front, did a test drive in the neighborhood, put everything back in the car - spare tire, tools, and special socket.  I need to check the tires on a daily basis at least the first week then weekly afterward - I should have the tires replaced sometime end of the year.