Splits ends, gah! How annoying.
The only way to completely get rid of split ends is to have them cut off. Trimming them yourself may be helpful but if you suspect the split ends ride far up your hair cutting them off will only make them rise higher. Regular trims can prevent this.
Now for what to do once you have got yourself in this mess.
Prevent further damage caused by heat, chlorine, snapping of your hair and other causes.
Deep Conditioners I would recommend:
Rainforest Moisture by The Body Shop
I bought this because I got a free sample in a magazine. First impressions were great because the texture was nice and quick so it really felt like it was nourishing my hair. It smelt great and it left my hair feeling silky smooth, less tangled than usual and it had more volume. I was impressed with this product and bought the shampoo and conditioner as well :)
If you have badly damaged hair the product should be used weekly after shampooing. I have only recently purchased this product so more advice with develop with more use.