Kelley Robertson is somebody in the sales training space that I admire greatly, and is a fellow Canadian if I may add! In this video, he outlines four situations when you can earn the right to move the sales process forward or ask for the sale.
Kelley is very active on Twitter, and you can follow him at @FearlessSelling
He has an excellent blog which can be found at http://fearless-selling.ca/blog/
Enjoy the video and be sure to connect with Kelley!