Recently at work I have been hosting more meetings, and one of the things I've always found annoying about presenting from my laptop is that I can't see the projector, so I end up just mirroring my display so I can see it on my laptop. The downside to this is that everything is mirrored (notifications, notes I'm taking, etc).
The simple thing I realized is that I can just use Windows magnifier in docked mode with the displays extended. The docked magnifier can sit on the laptop display, and the secondary (projector) display is free to show whatever. Then to see it, just mouse over it and view through the docked magnifier. This also let's you have notes up on the laptop display next to the magnifier.
This may be something many people know about (probably even an intended use case of the docked mode) but figured I'd share, and maybe it will prompt others to share their tips for presenting.