Well gang it's time to discuss protection techniques for negative energies
Well Jenn,
you're really going to have us posting like busy little beavers.

Like Alley and yourself, I use the same techniques, i.e. visualizing my self growing roots and returning all negative or as I prefer, all energies that are not necessary for me to Gaia (mother earth) and ask that she use them for the good of all.
I also like to visualize myself covered or surrounded by a purple ball of protection allowing only postive or energies that I need to penetrate and to prevent all that is not necessary for me to enter.
To this effect there is a daily excercise that I use first thing in the morning to protect myself for the day. It has to do with grounding ones self, taking energy and protecting themselves for the day.
Another technique that I use is to bring my energy/aura up close to my physical body, this I do by visualization.
It is said that our aura can extend an arms length away from our physical body, I have actually verified people whose aura extends way further than that, close to a 10 foot diameter. Well, when your that "open" you can not help but to affect other peoples energy levels or prevent others to affect yours. So by bringing my aura close up to my physical body (about 3-4 inches) I protect myself from others.
There you have it , my 2 cents.

Love and Light
Dom