Best time of day to check CM?

Chelsey • 27, happy wife of 4 years and I love my job! Due 5/28/15 with #1!
Hi everyone! I've been noticing that in the morning my CM always seems to look and feel about the same, but can change quite a bit throughout the day. Is there a certain time of day to check it, and if it does change, should I update my log on Glow? If I need to update, when and how often? Thanks!