Sales Training Articles To Help You With Your Sales Training Decisions. TSM Sales training is a sales training organisation helping companies and individuals increase their sales and conversions both online and offline. They offer sales training through open courses in Manchester and London, and bespoke sales training courses and inhouse training courses nationwide. You can find out more about TSM training and their courses by downloading their current sales training brochure from their website. Their areas of expertise include face to face sales, telephone sales training and telesales training, and internet marketing training courses.