I find myself having to stick to a single chord progression (because when improvising other parts, if I change the chord structure, I tend to botch later parts).
For instance, take this song:
http://deadlyredcube.com/Longing.mp3">http://deadlyredcube.com/Longing.mp3
With this song, I started with the mostly-arpeggio harp part, then layered on a more melodic one. There are points in it where I backed it down and thought "okay, something else will play here" but I didn't really have any sort of plan (which is what this whole post boils down to).
Then I layered on the top two violins, then the cellos and basses, finally adding the flute.
None of this was particularly planned out, but it did go rather quickly (from opening Sonar to the final mix it was about an hour and a half of work) and it came together rather well (albeit, it's a bit repetitive).
However, as stated earlier, this whole process is wicked limiting. I find myself wrestling with my process. If I'm sticking to a single instrument (especially piano), I can do fairly well (I'm very happy with http://mopofdestiny.com/ost/01-Piano%20Of%20Destiny.mp3).
How do you all do it? How do you keep your thoughts organized as you compose? Do you plan parts ahead of time? Do you have some kind of mystical shorthand that helps you scratch out parts on paper really quickly?
Inquiring minds want to know.
Thanks for any advice, and I apologize if this post seems to be a bit rambling.
Josh