picture your desired state as vividly as possible. Any detail you can presently replicate, do so.
Get cleaned up then sit and visualize a successful meeting. Sling your guitar over your shoulder, wear your stage clothes and play your hearth out while visualizing a successful gig. Sit in the room you’ll be sitting in when you close a deal.
If embarrassment overcomes your desire to achieve what you intend, if the thought of “what if it doesn’t work?” affects your actions, then feel free to disregard this approach.