Obviously, preparation is key, and if you keep accurate and well-organized accounts at home, your task will be that much easier when it comes to finding the documents you need.
Either way, your lawyer will assume that every document you provide will be challenged by your spouse’s lawyer, so you must submit the entire document, even if you think some of the pages look irrelevant. They might be crucial to your lawyer, and not submitting them will cause delay, and remember, delays cost you money.