Ableton Certified Trainer DJ Vespers has a whole treasure-trove of tutorials and downloads on his website and YouTube channel. Whether it's proper warping of an a capella, remixing a whole track, or making fat-sounding drums, Vespers' tutorials are an essential resource for any producer.
Vespers also offers a free eBook, Pro Secrets in Ableton Live, which you can grab bundled with a glitch Effects Rack and six high-quality tracks. Get the free bundle here.