I think it's a mistake to understand this subject as being primarily about persuasion and trying to apply Cialdini. Charisma doesn't come from an attempt to change other people but from doing inner work. If you are too much focused on the other person but not on yourself, you don't grow as well and won't be open to them.
Previous thread: http://lesswrong.com/lw/mnq/instrumental_rationality_questions_thread/
This thread is for asking the rationalist community for practical advice. It's inspired by the stupid questions series, but with an explicit focus on instrumental rationality.
Questions ranging from easy ("this is probably trivial for half the people on this site") to hard ("maybe someone here has a good answer, but probably not") are welcome. However, please stick to problems that you actually face or anticipate facing soon, not hypotheticals.
As with the stupid questions thread, don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better, and please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
(See also the Boring Advice Repository)