Here is an excerpt:
4. Document, document, document. It’s not practical to document everything on every matter, but document as much as you can in some contemporaneous manner. Letters are fine, but emails, detailed time entries and marginal notes on documents can be equally effective. In particular, you want to record advice or instructions that involve significant issues or outcomes and major client instructions or decisions. Memorialized communications help confirm what was said or done for the client should you need to look back to explain why or what work was done, to justify an account, or to defend on a malpractice claim.