Yea, I think the hand washing and avoiding touching your eyes, nose and face are the crucial bits.
If you have children--wash your hands constantly-they are covered in mucus!
As far as I know, the common cold is not nearly as airborne as people think.
I recall a pretty in-depth New Yorker article about a study where they had people living in an enclosed space--half the people were infected. The room was divided between the infected people on one side, uninfected on the other.
I forget how long the study ran, but it was a number of days. The cold did not get transmitted until a glass of water (or some other object)was passed from the infected side to the uninfected side. Then the cold spread like wildfire.
The study was inspired by stories about isolated islands that would be cold-free until the mail boat arrived. The boat driver never had any personal contact with the people on the island--he'd just drop off the mail sack, etc. There would be just enough mucus on the envelopes to transmit a cold to a few people.