The Body Shop has a Tea Tree oil line of products. The correcting stick is not very efficient IMO. The mask for the nose is great because you have to rip it off and the whole sebaceous shit goes away with it
Anyway, since I'm now boycotting their products, I turned to the essential oil of geranium. Put a couple of drops of it in any other oil (sweet almond / jojoba / lavender...) and use at night, it's a great skin regulator. I'll put a drop of pure geranium essential oil on a really bad pimple, it's very effective but it has a strong smell.