1. It takes good time management
In order to schedule your dates so nothing co-indices you really have to plan in a way that makes sense. If Guy 1 has basketball on Thursday from 6pm-9pm, it is a perfect time to plan for Guy 2. Just make sure that you confirm the whereabouts of Guy 1.
2. You gotta have a decent memory
I can't tell you how many times I watched movies with Guy 1 or Guy 14, and then when Guy 17 asked about it, I would claim that I saw the movie with him, but that wasn't the case. Memory is a good thing to have here.
3. Be careful with your phone
One of the worst things you can do while dating, is to hurt another guy by allowing him to see that you're dating around or that another guy has your interest. Be careful with your home, and until one of these guys if your boyfriend, there is no need to hurt anyone.