How do you manage multiple clients without missing deadlines?

[Btaliat]

One of the problems that most freelancers face is the issue of meeting up with deadlines especially when they are managing different clients. In doing this, you can make use of some artificial intelligence tools that can handle your repetitive tasks. Apart from this, you need to make sure that you are strong realistic deadlines for the tasks that they want to accept from clients. What do you think about this? What other ways do you think this can be done?