Five key lessons are summarized from The Apprentice episode: 1) Negotiate discounts aggressively and get free perks where possible; 2) Be organized for meetings with all relevant facts and figures to avoid embarrassment; 3) Maintain your energy levels throughout tasks as enthusiasm can fade; 4) Cut to the chase in negotiations and don't waste time with refusals; 5) Deliver on any promises made to clients or risk negative consequences.