If it doesn't feel right, don't do it and I mean if the client sounds off or strange in any way on the phone - you will be RIGHT. I could kick myself the number of times I ignored that inner voice of wisdom.
Use Vagisil Gel once a week to keep your ph balance healthy.
Save every number, even if it's from a timewasting twat, then you will know to ignore in the future.
Do NOT compromise on pricing. If punters want a bargain they can go elsewhere. There's a woman in my area offering BJ's for ?19.99 - WTF?? Does she give them a penny change??
Get enough sleep and drink wine!!