I have found: 1. At MPs, whatever my impression of the session, there was almost always 5-10% or more available if I had played well - particularly defended better. 2. At IMPs, whatever I thought of a match, there were always opportunities to make life more difficult for opponents and to react more boldly to partner's attempts to find the best result. If you can consistently concentrate, but stay mentally relaxed and objective, you will rapidly be a better player than nearly anyone.