Rather than bore you with my stories of spending 18 hours a day at the bar drinking interspersed with five different hour long sessions, spaced 4-6 hours apart, followed by five or six hours of sleep only to wash rinse and repeat the next day, I will try to give you some actually useful advice, because unless you are no older than mid forties with the constitution of an ox, I don't think I would recommend my old daily routine to anyone without some serious medical disclaimers about how bad for your health my old regimen used to be. lol
First off, Yes, spreading your sessions throughout the day is the best way to go. I used to start off with my first session first thing in the morning, either with the woman I spent the previous night with or with a new girl, usually at about 6-7 AM, followed by breakfast and then I'd hang around at the bar until I'd get the urge again and the right chica would come along, usually about noon or so. In Costa Rica "shift change" for the putas usually happened at about 4 PM and that is when the daytime girls, most of whom had kids would leave and the new crop of girls for the evening would start showing up. The hottest girls would usually get grabbed up fast, so I would inevitably grab one of the hottest the moment she'd walk in the door for session number three of the day. Usually session number four would happen at about 9PM, which also coincided with the arrival of the "night shift" and sometimes I would hang out with that girl for the entire evening and she would be my last of the day, other times I might hang out at the bar until around 12-2 AM and end up bringing up one more chica who might or might not end up staying the entire night. As I got into my fifties, sometimes session number five would end up with no finish and I'd keep her overnight so I could finish what I started in the morning.
Spaced out like this I was able to see four to five different women a day well into my fifties, even while spending almost all my down time at the bar, (not advisable for most guys if you want to perform). As long as you are healthy and with a healthy libido seeing a girl in the morning, another in the afternoon, and finally one last girl in the evening should be a snap, not to mention fun. I guess I should ask you what your usual appetite is, and I imagine your age will have a lot to do with it too, I could see 4-5 different women a day well into my fifties, but now at 61 I have to confess, your schedule of three a day spaced a good 6 hours apart or so sounds much more my style today.
Good luck and have fun.
BTW I know you young fuckers can do a lot more fucking than what I described. A buddy of mine who was in his thirties would fuck a different girl every couple of hours for the entire day/night and would often notch 7 or even 8 different girls in a day, I can't even imagine trying to do that, but everyone has a different libido. Just remember, it's not a competition, do whatever pace feels good for you.