Interview Training
Once you understand the dynamics of an interview situation (that odd posturing and positioning that can happen in interviews) then you can actually be more 'in charge' of the interview arena despite the possible power dynamics. Whatever is said about having only one chance to make a good first impression at your interview, we believe you have any number of chances to make a good impression even if you fluff the first one.
Having some solid interview techniques and skills can make all the difference between you getting what you want or you being disappointed because once again, the interview didn't go as well as you wanted it to.
Most people have an anxious time before, during and after their interviews: anxiety about how they'll do; anxiety about how they're doing; anxiety about how they did.