Building regular, short breaks into working time increases focus and productivity, studies have shown. One popular way to implement this is the Pomodoro Technique, named for the tomato-shaped timer used by the method’s creator, Francesco Cirillo. You use the timer to break work up into short periods, usually 25 minutes, with regular micro-breaks of around 5 minutes. Play around to find what timings suit you best.
Source: learn.filtered.com