I highly recommend that you read – or at least skim – every insert that comes with your bills. If you’ve gone paperless, there should be a link to the inserts that would have been included when you’re logged into your account.
The inserts include helpful information that you need to know: fee increases or decreases (granted, these are less frequent but they do happen – I noticed a few months ago that my bank no longer charges for American Express gift cheques); changes in insurance policy coverage for insurance bills; the length of any grace period in which you have to pay your bill, etc.
In my case, I just noticed that our natural gas provider offers a $35 rebate on Energy-Star rated washers. Before this, I was only aware of the LA DWP rebate. The DWP rebate is significantly more ($250) but $35 is hardly negligible.