Hi Kerry. there's a number of things that i do to keep negative energy at bay. Envisage the Archangel Michael wrapping me in a deep blue cloak of protection, the cloak zips up under your chin down under your feet and covers your whole body reaching back over you covering your third eye.
You can also envisage a white bubble of light that you switch on and step into each morning before your feet touch the floor, in your bubble is your quiet, your peace, your calm even your favourite music..you can get creative with this. Visualise any negative words, energy or acts as tiny little black arrows that bounce off your bubble. Nothing gets in without your permission!
In addition you can use crystals http://www.healingcrystals.com/Crystals_to_ward_off_Negative_Energy.... Each day when you get home from work (I imagine your wear a uniform) visualise that you are shedding and letting go of any negative energy from your work when you are changing. Salt water baths are also great for grounding and releasing negative energy.
The angels are always ready to assist so don't hesitate in asking for divine assistance.
I hope this helps. Love, light & Blessings Jaki xx
Kerry, you really should go to our humanity healing community where people are healers and supporters of our members: http://community.humanityhealing.net