The Basics of Financial Modeling by 
Financial Modeling for Business Owners and Entrepreneurs by 
Pro Excel Financial Modeling: Building Models for Technology Startups by 
Financial Modeling in Excel for Dummies by SCORE: Business Planning & Financial Statements Template Gallery
Access: Public
A resource partner of the U.S. Small Business Administration (SBA), SCORE offers free, easy-to-use Excel templates to help you plan for a new business, some of which include:
EY Finance Navigator's The Ultimate Guide to Financial Modeling for Startups provides a very comprehensive overview, along with helpful examples, to help you learn about best practices for financial modeling.
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