My hair is long, to the middle of my back. To cut my own hair, I take my curling iron (cold and not turned on) then grab a section as though I was going to curl it. I slide the curling iron down almost to the end. Then I hold the iron out in front of me and trim off the 1/2 inch of uneven ends. I go around all of my hair this way, just pinning out of the way what's already been cut. I never need help and I save a fortune!
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Even if you are too chicken to try to cut your own hair, you might start by TRIMMING it.