Some common traditions are:

1. Having a family Burns supper which includes eating Haggis and wearing tartan, in January, see: http://en.wikipedia.org/wiki/Burns_supper

2. Wearing tartan or the kilt for Christmas and Easter dinner.

3. Celebrating St. Andrew's Day in November. see: http://www.woodlands-junior.kent.sch...hs/andrew.html

Some families attend their local Highland Games in the summer, but this is not really a tradition. Also, some families are involved in Scottish Country Dancing. http://www.rscds.org/

Those who have wealth are often active in their local St. Andrews Society. Here is the link to the New York chapter: http://www.standrewsny.org/