It's almost 8pm now, so it's kind of a late blog post. Was your day what you wanted it to be? Sometimes we can't rest at night because we didn't get done today all that we thought we should have. Take note from Charlie Brown and let it go till tomorrow.
There is only one exception to that theory and that is to never put off your decision to follow Christ. We are not promised tomorrow and only knowing your eternal destiny will you rest with blessed assurance.... everything else can wait till another day.