Grounding, centering, and banishing are all very good ways to help with that.
A lot of those days are also caused by things like really bad astrological aspects (like Mars entering a sign it hates or Mercury going retrograde) or the moon going void of course. My boyfriend and I have found that a lot of this kind of negativity can be avoided just by knowing enough about the astrological forecast to see it coming. It can also help prevent long-term problems by making you more understanding of the situation. Like when Moon is in Aries, people are more hot-headed and prone to arguing, and if you realize it's just the astrology messing with your friend, they don't really mean that insult, you know not to take it seriously and it's one of those little things that can help prevent long-term arguments and problems.