Several months ago, I'd posted an article about term-sheets. Based on a lot of feedback, I've added some new comments about put rights and made more explicit my philosophy about working together with entrepreneurs to achieve mutually satisfactory results. Here's a link to A Philosophy of Valuation and Valuation example the accompanying spreadsheet.
The overarching theme is that if both groups (not sides!) the entrepreneur and the investor, can get aligned on terms that hold each side responsible for what it says it will do, and this process makes these promises explicit, the relationship begins on a solid footing. Beware the potential business partner, whether entrepreneur or investor, who says something like "This isn't really important, but our (lawyers, mothers-in-law, or other interested parties) insisted on it." Seems to me it's a poor way to build a relationship.