Overnight bids start around 9:00pm and go through 6:00 the next day. Points are 9 for a win, 8 for a place, and 7 for a show. If you bid on the A Window between 6:00am and 12:00 noon, points are 6, 5, & 4 respectively. If you bid in the B Window from 12:01 to 3:00 pm, points are 3, 2, or 1 depending on your place.
Most people playing just SWAG their bids and hope for the best. I, of course, have a highly scientific method that works most of the time. If you need help, just ask me. I'll take good care of you.
Here's my scientific bidding aid.
I just put a quarter in and she gives me a bid.
What??!! No, you may not take her out on a date!