Jane Fonda's candid memoir, My Life So Far, is enjoying brisk sales, while its author is busily criss-crossing the country doing lots of media and bookstore events. She is scheduled through mid-May and will visit at least 16 cities. The folks at Random House note that she is proving to be one of the hardest-working authors they have encountered. The book is in its second printing with close to 400,000 copies in print.