I'm listening to a jam right now from last night. All standards, grab a real book, pick a tune and tempo, go. Anyhoo, I record these things, cuz hey, I record everything. Then, I listen to it, over and over and over, and tear myself to shreds. I listen to these tunes I play, and I swear to myself, "Don't you know any non-triad notes!" Remember, I'm still getting the training wheels of my new jazz bicycle, and these things come with time. My toughest task at first was just getting through the changes. Can I get through a tune? Can I play through without dropping the beat or getting lost? I feel that's important, I am a bass player after all. So, I feel more and more comfortable with that, but now I'm starting to feel that I need to expand. I feel now as though I stay too much on triads or chords. I really way too much on those 3 or 4 notes. I will acknowledge other colors, like a #4 or add9 or whatever, but for your basic chords, like let's say AUTUMN LEAVES, I want more variety, melodically and rhythmically. I know this is a seriously roundabout way to ask, but one thing that works for me is analyzing what others have done, and building off of those techniques and approaches. STANDING IN THE SHADOWS OF MOTOWN was a tremendous guide for the R&B genre, because analyzing what Jamerson was doing, melodically and rhythmically, really helped me expand my vocabulary for that genre. What exists like this for jazz? Are there books with full bass line transcriptions to Standards? I know what you're going to say, transcribe them myself. Personally, I feel that this would be an excellent way to increase my sight reading abilities.