Center your name in larger, bold type on top of the page. Then your contact info - email/phone- and depending on what you are going for: height, weight, vocal range, union, hair color, eye color, ect.
Divide your experience into categories like improv, sketch, film/tv, voiceover, etc., with training at the bottom.
A good way to get your experience lined up nice and neat is to use a table with no borders. Then your text will line up without having to figure out the infuriating column formatting. Even if you don't have much for each category, having a neat resume will showcase what you do have.
Pictures speak louder than words, so here's an example that I found:
In closing, google acting resume or use google images and you will find all kinds of suggestions. Find what works for you and have it ready the next time an audish calls.