How could I stop my habit of picking at my split ends, and get rid of them?

Ok my hair is kind of long, I guess. Yet, whenever I am bored or waiting or just doing nothing, I would grab a few strands of hair and then start pulling apart split ends. I know this is a bad habit, but I REALLY want to stop. I trim them once every month, and I NEVER use straighteners, hair dryers, heat hair curlers, etc. I always use a comb after I shower. I tie my hair back with scrunchies into a ponytail. If I ever see a split end I would think about pulling it apart, then I tell myself to stop, but at times I would keep going until I get really frustrated. There is this method I have been using for a whole month, but it isn't working. I have this rubber band around my wrist and if I attempt to pick at my split ends, then I would grab the rubber band, then I would let it go and hurt my wrist. Then I wouldn't do it after awhile, but then I go back to it. Is there something I could do to get rid of split ends? Also, another method of stopping myself from picking at my splits ends, instead of hurting myself? Ha ha Please and Thank you!