The biggest difference in fishing morning/evening vs. mid day is fish location. Fish are more active at certain times and adjust their location accordingly. That location change could be as little as moving deeper or shallower, tighter to cover or structure, or as much as a migration from a shallow feeding flat, back to the deep water they call home when not feeding.
Often during mid-day the fish aren't active. Where they go and how they position themselves in relation to that cover or structure is two fold. The difficult part is determining where they go. Wind direction, current, shade, light penetration etc. will dictate where they'll likely be on that cover or structure in most cases.
There are fish that stay shallow or use shallow water as their home base all summer and many bassers target these fish as the first part of that equation is eliminated for the most part. They, those fish, don't move great distances. If you find them on a flat when they're feeding, they'll likely still be there during their off feed hours providing there haven't been any drastic weather changes.
You know your lake fairly well, or well enough to catch fish during the low light, high activity periods. Take that information and fine tune it paying attention to the details and you'll find the fish. Then it's just a matter of getting them to commit to your offering and hoping that the wind, or sun or whatever doesn't change without you noticing it, because I guarantee the fish will.