This question got posted on another board today and I stole it.  It go me thinking about what I am most nervous of and this is what I wrote:
"This is kind of silly but I am nervous about the fact that I have a corset back for my dress and there is only one person who I want to lace it for me and she might not be there to do it.  I have no idea who else to ask because I don't want my stepmom or stepsister to even really help me at all."  
So what make you nervous?