Mind your P's and Q's
Be careful about peeing in the receptacle provided
Don't join the check out queue where the asstant is such a hurry that your items pile up and crash to the floor before you can get them into your bags
One swallow doesn't make a summer
No, but it helps the food go down
Don't reinvent the wheel
Express yourself without using tired out cliches
Too many cooks spoil the broth
It is best to have your soup without cooks floating in it