Yeah by breaks they probably mean logging out for random amounts of time (usually at least 25 minutes is recommended) before logging back in and going for more. I tend to go for 2-3 hours always a random amount of minutes (like 127/177/133) , then taking a break for a random amount of time (like 27, 39, 48) then going for another random amount of time generally no longer than 3-4 hours. Just my opinion!