As an editor, I see a ton of manuscripts, mostly fiction these days. The fun of editing a new author is watching them develop their own style within the framework of writing.
One of the things that many of the beginners I work with is that they have a problem ending chapters effectively.
I have two suggestions: 1) keep your chapters about the same length, which forces you to really think about scenes and pacing and 2) make sure your characters’ business is finished in that chapter before you break for a new one. That is, you want your reader to feel satisfied, as if something was happened and reasonably resolved or at least reasonably explained before sending them to a new chapter.
Aaron Elkins has a good piece over at Writer’s Digest to help you with “chaptering.”