Here is a useful cheat sheet: http://www.scribd.com/doc/3152662/How-to-Win-Friends-and-Influence-People-cheat-sheet
I would recommend reading the book or listening to the audiobook, it is actually a pretty engaging read, ab it heavy on the business examples though. You do need to put effort into developing 5 second skills and heuristics for it to be all that useful, otherwise it is just a load of points that sits in the back of your mind.
I would also recommend The Teaching Company's "Effective Communication Skills" if you want more on the subject.
Thanks! I always wind up googling the basic rules for a crash-course review every time I really want to make a good impression.
In the very back of Kaj's excellent How to Run a Successful Less Wrong Meetup Group booklet, he has a recommended reading section, including the classic book How to Win Friends and Influence People.
It just so happens that not only have I read the book myself, but I have written up a concise summary of the core advice here. Kaj suggested that I post this on the discussion section because others might find it useful, so here you go!
I suspect that more people are willing to read a summary of a book from the 1930s than an actual book from the 1930s. What I will say about reading the long-form text is that it can be more useful for internalizing these concepts and giving examples of them. It is far too easy to abstractly know what you need to do, much harder to actually take action on those beliefs...