If it's boring and/or stupid, around 10 minute sessions. If it's just boring, about 30 minute stretches. If it's really interesting, between 4 and 6 hours (to

If it's boring and/or stupid, around 10 minute sessions. If it's just boring, about 30 minute stretches. If it's really interesting, between 4 and 6 hours (toilet and coffee breaks included).