Sometimes it can help your understanding by actually reviewing the application forms, seeing the way the questions are formulated and better understanding how the documents you collect meet the rules.

I don't know if you've already done this but here are some forms you can download/print out:-

Personal Details Form (VAF4A JULY 2012) Partner Settlement (spouse visa)

APPENDIX 2 (VAF 4A JULY 2012) Financial Requirement Form

Guidance Notes

Guide to Supporting Documents (outside UK applications)

Worth the effort and may help you reach your goal with less stress.