As an orgo tutor I tell my students to follow basic strategies throughout mechanisms. You can predict mechanisms based on knowledge of the reaction. For instance If it is acid catalyzed always draw acid as AH or A: on the side of intermediates and make sure you regenerate it at the end. What were your leaving groups and if it was water does it participate in the reaction down the line, are questions to ask yourself. Also practice makes perfect draw this mechanism over and over until you see it in your sleep.