Use majickal tools that will represent protection, balance, centering, and perhaps an object from the original spell.

Be sure to cast your circle properly before practicing any majick ritual.

Chant:

"On the Eve of date,
I cast a spell
The effects I created
I now must quell,
Specifically, what it is.
May this spell be lifted,
and I now be gifted
With what it should be."

(This spell's purpose is not to undo a majickal working that has negative repercussions. This does not 'un-do' a spell, it stops it from continuing, or alters it slightly. Remember the Threefold Law.)