Hi Alisha, thanks for sharing your methodology of creating a scrapbook page. As you've pointed out, people have different methods. I guess the best way is what works best for each individual.
For me, I have a similar method to yours. But I do find it much easier and time-saving to use scrapbook sketches. I have a "map" to follow along and don't have to spend time working out an arrangement. This way, I know how many different papers I need and so on and set off to create right away. Using sketches is a great way to create more pages quickly especially if you have limited time. :-)