POV, there are only three basic types, but it's one of the issues the comes up consistently when I'm editing. Do you need first person, the every sneaky second person, third person limited (or even more tricky, third person omnescient)? 

Look at the needs of your novel. Do you want to stick with one character all the way through? Do you want to let the reader experience the story through the point of view of one particular character, and only them? Then first person (the "I/me" POV) might be for you.

(Please please please don't write more than one POV character in first person, it makes it very difficult to keep track of who is doing what. Only if you are very very sure of your control over tone should you even attempt this).

Going along with the above order, second person (the "you/your" POV) is very sneaky. If done for the extent of a novel, it can become very tiresome for the reader unless they're reading a "Choose Your Own Adventure" novel. It is also very hard to do well, as it can become dictatorial instead of fun to read. 

The most common POV style in modern writing is third person (the he/she/they POV). This is possibly one of the more versatile POVs since it can be used to follow one character or many. Even limited (stuck in one character's head for the duration of the book, chapter, or scene), it has more options than just first person. 

However, it is important to keep the current point of view character very strongly in the reader's mind. In many novels, I find that if an author isn't careful, the POV grows more indistinct when there are more than one characters involved. It is important for the reader to not become a disembodied ghost above the action or to feel as if they are head hopping between characters. The POV character should never disappear during the scene.

Especially important (in many books, your mileage may vary) is the use of a strong POV character's voice, and not an all encompassing narrator voice within the story. Narrator voice has been done well in the past, but by few authors. Most often, it ends up yanking the reader from the story (often when combined with infodumps, i.e. improperly executed exposition). 

Most books in genre fiction are written in first person or third person limited. Omniscient POVs are less often used now than they were in the nineteenth and early twentieth centuries. If you don’t want to confuse your reader or yank them around unnecessarily, it’s vital that each chapter or scene sticks with one POV and remains there, delving in as deeply as possible. Most often, novice authors utilize a vaguely omniscient POV shifting that doesn’t really let the reader settle into the characters and instead feels superficial.

Part of the reason, I feel, for this might be that we all grew up omniscient POV. It used to be acceptable to head jump and go from point of view to point of view within a scene, but that didn’t mean the writing was any good. It takes a very skilled writer to pull off omniscient POV today and make it so that the reader enjoys the book without noticing it. However, not only are those writers few and far between, no one wants to read omniscient anymore. We like to get cozy with the characters and see where their minds go, not jump from head to head.

Another reason readers avoid omniscient POV now is because they’ve been exposed to too many instances where it indicates sloppy writing. For many readers, limited POVs are more satisfying to read because they’re honed and carefully thought out. If the reader could just jump from the good guy to the bad guy’s head as easy as that, it destroys the tension and makes the book less interesting.

On a similar note, be very careful of "too many POVs"itis. The more characters you have, the longer the book will need to be in order to do them all justice. Don't give a character a point of view chapter or scene if we will never see them again since them having a POV leads the reader into thinking they're important to the novel. Also, be very careful to develop each character to whom you give a POV. Delve as deeply as you can into their experience, their thoughts, and their emotions. This will give the reader the best experience and make them truly invested in your writing.