I had the same problems when I started. As far as the left side issue (I'm right handed), I've found that using the left hand works best. It took some time to get coordinated but it works for me. I've also tried reversing the razor in the dominate hand but that didn't work as well.

As far as the the hollows of the neck, I always have trouble around my Adam's apple. The best solution I've found is using just the toe of the razor (a round point works best for me) and buffing the area several times at slightly different angles and using a slicing motion. I've got a really weird swirl to the whisker pattern on my neck. It can be a real challenge sometimes.

Pelkey