If you really think about it, designing a flyer from scratch and rolling a dice have a lot in common. Except for the fact that the dice thing is only a matter of chance, yet the art of designing relies on creativity as well. The thing is, with the artistic challenges you face going down that road to get yourself the best flyer ever, at some point, you just have to roll with it and see where it goes.
But as long as you have access to some premade file like this summer flyer template one, all you have to do is to first choose what you want your final artwork to look like, find a similar readymade template and then just download it. So easy, right?