Hello Tony, I've been trying to master this art for years. It's a very tough one, and I know others can do it very well. For me personally, things are what they are. Hurt is what it is, anger the same.
I've realised recently that my way of 'channelling' these negative feelings is to accept that they are there, for better or worse, and that the only way out is through.
If I'm feeling useless or inadequate, for example, at a particular thing, then the only way to overcome those feelings is to keep trying and getting better. You can't get better at something by giving up and feeling sorry for yourself.
I have thrown myself into creative endeavours over the years too, and it's funny because at the time I didn't consciouosly think that I was channelling, but during those years I was hurting a lot. As I started to become more stable in recent years, my desire to do creative things dropped away, and at first that made me very upset and out of sorts. It was at that point that I realised that perhaps I had been channelling all that time, and that maybe the reason I didn't feel the need to be creative anymore was because that had served its purpose in my life.
Thanks for provoking good thoughts!