A very easy way to organize your planner, when it doesn’t have visual separations or dividers between sections is to use tabs.
Tabs are cheap, they come in all kinds of shapes, colors and styles. I particularly use tabs in my hobonichi planner, because this book doesn’t have clear dividers and i need to have different sections clearly visible. I also use tabs in my spiral bound planner, where i clearly mark my monthly or notes sections, since i use them for organizing my finances and make list of things i need to remember.
There you go, a very easy way to know where things are at, in your planner. After all, your planner needs to be well organized physically to be an effective tool.