HIGHLIGHTS: Five topics to avoid on Thanksgiving are politics . . . family gossip . . . anything about religion that might be controversial . . . your weight, because it might make people self-conscious about their OWN weight . . . and too many good things that happened to you this year. Mention a few, but don’t spend the whole dinner bragging. FULL STORY: A few safe things to talk about on Thanksgiving are TV shows, showbiz news, football, and the weather. Boring, yes, but safe.