Hi
Yes I do hire people for my shop. I just added a new part time person and she is working out great.
I also use Task Rabbit for short duration tasks - like getting caught up on inventory etc.
I created a job description and have refined it over time. Not everyone is a good fit - its super important to understand the traits that are important to you & other skills that you don't mind having to support or teach.
As an example - I have found that attention to detail is one of the things most important to me.
As for where to find people, I have advertised on a local community website, networked with friends/family etc.
Hope