what helped me nail the C majar and all chords really, was adjusting several little things. First was how I was holding the guitar. I needed to move the neck out more, I also had to make sure I was tucking my elbow into my side. With those two adjustments it was easier for my ring finger to reach it's place on the A string 3rd fret!

This helped because it put my wrist in a better ailignment with the neck of the guitar. I also realized that it helped me when I was doing scales and stuff.

Also, my thumb placement. I noticed that I had a habit of having my wrist turned inward a bit, so I twisted my wrist outward and my thumb a slight bit closer to the head stock.

Now that I am in the habit of tucking my elbow into my side, things have gone a lot better!