A well-structured experimentation document will save the CRO practitioner a great deal of time and will create great reporting for stakeholders on an experiment’s details.
Someone told me that "best practice is pooled ignorance." They're right! Here are a few examples of best practices that run counter to the usual thinking.
If you're going to offer the customer a reward of some type, consider re-framing that offer in another way and see which one converts at a higher rate.
Testing for testing's sake is all well and good, but to really understand your customer you should have a strategic plan and calendar that creates long lasting lessons you can draw on.