The "Card" on the side of the panel says "This panel board has a maximum short circuit rating of 22,000 RMS symmetrical amperes, 240 volts max. . The main breaker has 100 on it, the left side has 3 20amp breakers I dble 30 amp and 1 15. . The right side has 4 20 amp breakers and 1 dblw 30 amp. . One of the 20 amp breakers will break occasionally. . How can I correctg this?? Thanks for any help

That is a 100A panel.
The breaker that is tripping most likely has too much of a load. Don't run so much at the same time on that circuit and the breaker will not trip.

Gene you are apparently exceeding the 20 amp maximum load on the circuit. Is it the same breaker popping each time? If it, is eliminate some of the load and you should be okay.