I like to use a slightly different method. I prefer to write my cues directly into my book, because I am afraid that post-its will fall out (paranoid, I know).
You will need a 6" ruler and an eraser for the many changes that will happen in tech. Copy your script so you have a wide margin on whichever side you prefer. Use a ruler to draw a horizontal line from the edge of the page to where the cue happens, then a short vertical line down into the text to mark exactly where the cue needs to happen. You can also add notes along the horizontal line (as Susie crosses, etc). If you have multiple cues happening together you can list them under the line, i.e. one GO per horizontal line.
I do the same for standbys, and write out both standby and go (SB/GO) at the end of the line at the edge of the page. It seems redundent to write it out, but I have found after many years of trying different things that I like to be able to look at the page and know exactly what I am saying, even if I have 15 people talking on headset or am in the middle of a crisis. As everyone has said, it will take some work on timing everything out to get it right, so don't be afraid to practice on your own or with your ASM's.
Once the cues are set, I use 1/4" color coded labels to differentiate standby's (red), and GO's (green), and different color highlighter/highlighter tape to mark flies, sound, etc (colors depend on cue light colors).
Try many different styles, keep those that work for you, and ditch those that don't. Don't be afraid to try something you see another SM doing (I just "borrowed" an idea from my new ASM the other day after doing things the same for several years).
Best of luck, and you'll be amazing!!
SSM