There's a part of writing that I'm not terribly fond of: editing. Ask different authors if they prefer writing or editing and you're likely to get a mix of answers. 

I will never forget the day I drove down to FedEx and printed out my entire manuscript. I felt very accomplished to hold all 297 pages in my hands, but there was a problem. It should have only been 286 pages because I had printed one chapter twice, which also caused issues with my page numbering and formatting. I also should have gone through many, many more rounds of editing before thinking I was close to being done (286 pages is not impressive when it isn't very good).  

There are a few books I wish I had read in their entirety prior to editing my manuscript, rather than just reading one and taking a stab at it.

1. Revision Fiction: Making Sense of the Madness by Kirt Hickman. This book is fairly comprehensive and covers quite a few topics related to editing your manuscript, including proper formatting for submission to an agent. My favorite thing about this book is how concise the guidance is and how easy it is to apply. I've learned more from this book than anywhere else, and for that, it is my go-to for all things editing.

2. The Emotion Thesaurus: A Writer's Guide to Character Expression by Becca Puglisi and Angela Ackerman. The way your characters interact with others, and how they act when alone, is what gives them authenticity. Having a character shrug every time he/she is confused throughout your book distracts readers from your scene, and ultimately, your novel as a whole. This thesaurus helped me keep character expression fresh and, subsequently, reduced the number of "tells" and increased my number of "shows."

3. Self-Editing for Fiction Writers by Renni Browne and Dave King. This was the first book I used when editing my manuscript. For a first go-through (and second, third, etc.) it has a lot of really good information and helps to think about things from a different perspective. Editing isn't just checking grammar and punctuation; there's a whole host of things that need to be considered.

4. Creating Character Emotions by Ann Hood. This is similar to the Emotion Thesaurus, but it also provides examples to help illustrate the key point. Conversely, it also gives examples of what not to do, which I personally found to be more helpful than the examples of the correct things to do.

5. The Elements of Style by William Strunk Jr. This book was originally written in 1918. I know what you're thinking: what does a 100+ year-old book have that's relevant to today? I was shocked to find that actually it has quite a few gold nuggets (really, the whole book is one giant nugget). There's a list of word and expressions commonly misused, which I found to be incredibly valuable during the whole editing process. It also has a guide on the proper way to write certain things that you might not think about until it's staring at you on the page (i.e. in time, is it proper to write it as 9:30AM, 9:30 A.M., 9:30 am, or 9:30 a.m).

6. Rewrite Right by Jan Venolia. This is similar in nature to #5 above, but is more geared towards writing directly and clearly. 

I would recommend finishing the entire first draft of a manuscript first, and then going back and editing. I initially tried to do a cycle of write ten chapters, edit ten chapters, but I think that did more harm than good. First let the creativeness flow, enjoy seeing where the story takes you, and then go back and polish it.