I like NLP Applications where you can get direct feedback on the results of skills. One area that I have done a lot of work with NLP is CV Writing and Job Interview Techniques.
This article looks generally at how some NLP Techniques relate to sales. Many people do not realise that applying for jobs is just sales technique. If you are interested in exploring Hypnotic Persuasion Techniques applied to job searching skills then have a look at the Hypnotic Interview Skills Programme.