For those who are exploring the idea of a poly relationship, probably one of the most important things to sort out in your mind, before entering into the relationship, is "Why is this important to me and my mate?" If it is to fulfill a need which you are not getting from your mate, then don't even consider this type of life, as it will only complicate things more. If it is someone who is inviting you into this type of relationship, then ask a similar question, "Why is it important to me and to them?"
From the reading that I have done, on this site, I would have to say that the two most difficult stumbling blocks to overcome are trust and jealousy. As one experiences and
overcomes jealousy, they will learn to trust. Likewise as one learns to trust, they will experience jealousy less often.
Do enjoy this incredible site, as it is a unique library of information, and a place of sincere support.