How to cut STL files when they don't fit your printer AND to save material

In this video I show you how you can slice apart your STL files if they don't fit your printer or if you want to save print material.
To do that I'm mostly using Meshmixer, but also Blender and give you a quick overview of what I do to prepare files before printing them.

If you want to know which projects I'm currently working on for future videos:

[joejvitale]

Now that's an efficient and informaative 4 minute video. Well done!

[Spadecut]

i don't usually comment but u saved my life haha :) great video, thanks!!

[NJTSuperKing]

This is what I've been looking for. Not sure why programs like blender have no simple way of making organic cuts. It seems like a no brainer that someone would want an intuitive way of doing this.

[samruddhapurekar]

after selecting, how to rotate the model as it becomes difficult to move the model and make the selection at the same time