1. Do not bring up the beautiful weather unless the clerk does first. Nothing is more depressing to the clerk than to have a customer come up gushing about the beautiful day and all the yard work they are going to get done and praising the glorious sunshine and then leave saying something like, "hope you get out there!" Because there is a good chance they won't get out there. And you have just reminded them of all the things they would like to be doing but can't because they are serving you. You may think "why should I care if they get depressed about their job? Why should I curb my enthusiasm?" Well, because you can. Because you are powerful and strong and in control. That's why.
2. Your kids are cute and so smart, but you still should make sure they don't terrorize other humans. Not everyone is in as good a mood as you. Instill some manners in your kids and have them practice leaving their razor scooter outside and not shouting or spilling smoothies indoors. Don't keep them indoors too long; take them to the park already.
3. Instead of gushing about the sunshine directly, take on a sunny attitude. If it's a beautiful day and you are feeling good, be friendly to the people around you. (This goes for everyone).
THANK YOU HAVE A NICE DAY.