Due diligence is a critical factor in the success rate of angel investments in startups. That's what the statistics show. But many different views on due diligence are out there, and there are many different angel investment groups and producers of approaches.

Angel To Exit provides these without endoresement. So beware!

o Willamette University Tools
o Keiretsu Forum's Due diligence Handbook (pdf)
o Tech.Co's Angel Investing series
o Forbes: How much DD does an angel need to do?
o 14 tpes of information for your DD checklist
o How to impress investors...
o Small business encyclopedia
o 10 Due Diligence Survival Strategies for Entrepreneurs
o Doing Due Diligence - Importance to Investors
o Conducting Due Diligence.
o Wharton School: Due diligence for purchasing businesses
o The VC due diligence process.
o What an entrepreneur should ask of the investors.