I put a lot of thought into my story proposals. Not just what they say but when to send them. For example, I never send queries on a Monday morning. I’m not sure it actually matters – after all, does an editor really read my query the same day I send it? – but I know I’m busy on a Monday, and I assume most editors are, too.
Which day of the week to send the query is just one element I take into account when pitching a story idea. There are other, more tangible considerations as well. These often determine whether I make a sale, get a rejection, or have to wait another year until the window of opportunity cycles back again.