What's the right way to take pictures when taking notes in a conference setting?

I go to conferences and talks often. It's necessary to take photos of the slides in the presentation when taking notes. Currently I do this with a phone. The good about this approach is all the needed functions are there. There are many note taking apps. I can write on the screen. There's a built-in camera and I can easily snap a photo within the app. The bad is the hardware really suck. A phone (even a phablet like the Galaxy Note) is too small for comfortable writing. A typical pinhole...

What's the right way to take pictures when taking notes in a conference setting?

What's the right way to take pictures when taking notes in a conference setting?