It's easy enough to reel in a Sagittarius, but it's nearly impossible to keep one faithful. Learn how to use astrology advice in dating, by watching this how-to video. Pick up tips on making a relationship with a Sagittarius work. The best advice for dating a Sagittarius is to be a good audience. A Sagittarius loves people who are always willing to be quiet and listen to their problems, and this video also advises you to love the outdoors and work on that non-possessive nature.