What's your fave way to ground and shield?

If I want a strong shield I will envision arms wrapping around me erecting a wall, and then I will envision a circle around me with mirror coating on the outside and focus all of my energy to create another bubble inside of the circle and i will then expel my energy like shards piercing my attacker.
Other times I will not shield myself, and will feed off the energy of the other person or spirit/ect. that is attacking me leaving them dried up and in a spiritual attack dead. Then I filter the energy taken from that person/thing and cycle it through the earth and draw it back into me. Other times I will feel an attack and with my will say "NO" and see/feel like the energy is crashing around me and circling back onto the sender.
I LOVE spiritual warfare and enjoy being attacked because not only does it allow me to try out new things, it also gives me a chance to 'flex' my magical muscles lol. I know it sounds weird, but I really do.

What is your faviorite way to shield?