R_J_K75
Legend
I also affirm the rehearsal part of offering the suggestion to be very helpful. In fact, just give it some time before presenting it to the intended recipient in order to remove more of the emotion and keep it simple and factual.
I also do this in some circumstances. At work I may write an email to organize my thoughts better, but in some instances when you remove the emotion you can also remove the sincerity. Ive been in meetings at work that were well managed but the ones that turned into heated arguments sometimes got the best results. The more passionate you are sometimes the more it shows you really care.