Choosing a correct exposure can be difficult at times, especially in bright light. I've become pretty good and reading my LCD screen and using zebra stripes to figure out a correct exposure on the fly, but there are a few more options. Two of them I had not even heard of before.
This great video by the Academy of Storytellers goes over the four main tools you can use in camera to choose a perfect exposure.
This is the go to tool for most photographers and videographers. It will give you a graph with shadows on the left and highlights on the right. You will easily be able to see when you can clipping data on either end.
2. Zebra Stripes
This is my personal method for finding a correct exposure. I like that I can see my scene, and I can easily see what is blowing out. In many cases, objects like the sky will be blown out in spots, and that is ok. I make sure that my subject doesn't have any hot spots, for instance on a their forehead.
3. Wave Form
The wave form works like a histogram with even more data. Not only does it tell you how much of the image is over or under exposed, but it will also show you the exposure for different areas of your scene.
4. RGB Parade
The RGB parade is a wave form split into the red blue and green channels. This allows you to see if individual color channels are being blown out, as well as the entire scene.
I personally have not used the wave form or RGB parade, and to be honest I'm not sure our Nikon D750 cameras even have that option. That being said I will certainly start to use them as we get into color correcting our footage in Premiere.