Do you have a POV preference? Do many authors still use omniscient POV? Is there a proper way to use multiple POVs (or is it PsOV?) so as not to confuse the reader? I've read a book that jumped from POV to POV, sometimes in the same paragraph or sentence, and not only did I feel dizzy, I felt schizophrenic!
The story determines the POV. Some stories need to be first person, others need to be third. If you're not sure which your story needs to be, rewrite a couple of chapters in various POVs. Which one works? When you hit the right one, you'll know.
Yes, there is a proper way to use multiple POVs but I don't recommend it unless you know what you're doing. Someone help me out with examples--the only ones I can think of right off are ones that I'm embarrassed to admit I've read.
You cannot change POVs within the same sentence or paragraph. If you're going to do multiple POVs, you need to give some indication that you're changing, like a new chapter (my preference) or a *** or even an extra paragraph return.
[POV is Point of View. If you don't know the difference between various POVs, go to the library and find a writing book that talks about it. Study it until you can tell in the first sentence what a book is written in.)
I was talking to some friends last night and they reminded me of a couple of YA titles that handle changing POV well:
Flipped by Wendelin Van Draanen
My Angelica by Carol Lynch Williams
The View from Saturday by E.L. Konigsburg
Also, you can read some discussions of changing POV here and here. If you know of others, post them in the comments section.