Great article, Nicole!
A few things I've found helpful when creating software simulations:
1. The zoom function in Storyline is really helpful when you need to draw the learner's attention to the one task being taught, or just to enlarge a small section of a very complicated user interface.
2. When preparing your recording area, consider what size/aspect ratio you are using in your course display settings and match it. If your Storyline slide are is 720x540, you won't want a screen recording that is something crazy like 1020x480 (okay, yes I just made that up!)
3. I like to use a combination of screen recordings and static screen shots. I've found the way to make these match most closely is to insert the video into Storyline, publish it, and grab the static shots from the published course. This is especially helpful if someone else has done the original screen recording.
Hope this helps!