Katwhiskers,
Namaste...
How do you know if you are grounded?
For me, if I'm feeling spacey, easily distracted, not focused, having difficulty making decisions, daydreaming, procrastinating my work...those things indicate I may not be very grounded.
If I'm focused, "on top of things", can make decisions without feeling scattered in my brain, manifesting my work well...I'm doing fairly well.
As far as a grounding technique...I really like using water. Either splashing some cold on my face or running over my hands, but my favorite is doing the sea salt soak in a hot tub of water.
It's clearing and grounding and relaxing...ah.
I hope this has been a help.
Abundant blessings,
Mammabear