For more answers, see:
R' Mordechai Becher; R' Moshe Newman. After the return: maintaining good family relations and adjusting to your new lifestyle—a practical halachic guide for the newly observant. Chapter 1: "Evolution or revolution?"
(Please note: The book was written for ba'alei teshuvah. Page 9 warns that many of the rulings in the book are forbidden for non-ba'alei teshuvah to follow.)