This is how I did it (with amfilm):
1. Align screen protector on screen.
2. Use 2-3 of the dust stickers to make a hinge (like in this video
https://www.youtube.com/watch?v=f5zU1KtBQB4. I recall someone saying they leave a harsh residue? This was not my experience and their adhesive was very simple to wipe off with the standard wet/dry wipe.
3. When ready, turn on a hot shower in your bathroom. Close the door for 8-10 minutes. Make sure you have a surface where you can properly apply it.
4. Return to the (hopefully steamy) bathroom and peel off adhesive side of protector. Lay it down (working together with the hinge you placed). You may exit the bathroom now.
5. Press the top and edges of the protector with the tools provided and squeeze out remaining bubbles. Check the middle of them to ensure they're not dust.
6. That's it! *You may leave it to sit for a while, if you want.
Most important tip is to align the screen protector before hinging very precisely. You're pretty much giving all of you faith to it once you apply, so open and close the hinge to check it out after you've made the hinge.