I have found that colaberation really works best for me. Often, if I have a good riff or some kind of part, but still needs the rest, I can look to a cowriter to help. I have a difficult time writing by myself. It always seems that if someone else is there the ideas start to flow. Also I have noticed that I am a good arranger of other peoples music. If someone has some good ideas it is easy for me to give it some coheasion and order.