Written by Rhonda Stock
When I write, even if I have multiple main characters, I try to make sure each scene is written from only one point of view - no head-hopping. The writing gets much stronger!
So for example, let's say your two main characters are out at supper. I would think about the scene and what is going to happen and then I would decide whose viewpoint is more important to that scene. Choose that person and write it from their point of view only. You can convey some of what the other person is thinking through their actions, gestures, and words, but don't give us their thoughts.
But what if the other character's thoughts become important? Scene change! So say that scene is from Joe's point of view. But your characters are going to go get in their car and drive away, and you think what happens in the car would be better from Jenny's point of view. So you would insert a scene break (usually shown by entering twice on the computer to leave an extra line) and then start the next scene in Jenny's head and only tell us her thoughts. If she was thinking something at the restaurant that you think was really important, but you can't tell us because we're in Joe's head, maybe she can think about it when they are in the car instead. By adding the line break in between the two "scenes," the reader can expect that the next scene might be from a different point of view and it won't jar them out of the story to suddenly be in Jenny's head.
It takes some creativity - that was the hardest part with my Jake books - writing from only Jake's point of view and in only his head and finding other ways to get the necessary info to the reader.
I think you will find that your story gets stronger if you do that though. As I started to go through and pick who would tell certain parts of the story, I found out that some things I thought were really important were things that I didn't actually need.