I have very limited experience with EVA foam builds(started today) and I'd like to post a few of the mistakes and corrections I have made so that you all may learn from them.
1. keep in mind the direction of the textured side if it matters to your build.
2. Go slow with your cuts and edging.
3. Always be sure to check that you've marked what needs to be cut and ONLY what needs to be cut(in my case ONLY is an issue as I follow all marks with a score of the X-Acto).
Using a ruler to hold down your templates while you trace them can prevent them from sliding around:
Yes, my ruler is indeed pink.
I also use thumbtacks(push pins for sewing will also work but be careful to not push them completely through) to hold thinner pieces Down:
This leaves small holes so it's best to use in places that won't be shown such as the backs of parts or areas that will be cut out. If not using Plasti Dip as a sealant should smooth them out.
It's a good idea to save your scraps.
I personally use the little jigsaw pieces to hold sharp things:
I'm sure I will inevitably make more mistakes so I will update accordingly.
Also, anyone else that has mistakes and corrections feel free to upload them with picture examples.