Cutting bricks is a hazardous operation. It can be done using a hammer and bolster or a disc cutter. It is recommended that once the dry bond is set and broken bonds/cuts have been established that all the cutting is done in one single operation. This is beneficial for 2 reasons, all the dust and hazards are over with quickly and secondly the laying process is much smoother, ie no stop/start throughout the work. Once the cuts are complete it is advised that all the cuts are placed close to where they are to be used.
Watch my video on the fine art of cutting bricks.