This is why I try to book punts earlier, so I don't waste a whole day anticipating it.
Much prefer an early punt otherwise am pretty useless all day.
I hate booking weeks in advance too. By the time the day comes, my mood is different and I am possibly wanting something different.......there are a few exceptions though:
Madlin Moon, Rebecca More, Naughty Slut Soph, Sexy Elise....positively look forward to those with great anticipation!
It hasn't happened to me much, but I have found if I am kept waiting more than 15mins, or messed about before a punt, I start to get very negative.