After showing up and positioning yourself for opportunity, the second piece of advice I give to #Voice Over Talent (Veteran and just starting out) is ... read. Read everything you can get your hands on. Literally.
Reading materials from all sources exposes you to new content. You never know what topic you may be asked to do a voice session for. The more you learn about, the more you can bring to the table as a voice talent.
Plus you'll learn something new... which is cool