surely I can think of something better to write than "cheers"

39 ways to close your emails

Some of my favorites from that page, including the comments:

Be well, do good deeds, and keep in touch
Confusion to your enemies
Tag. You’re it
The end (for now)
Up, up, and away,
Ta,
Happy Trails
Ciao for now
Upward and onward
osmosis, amoeba
Have a magical day