Who doesn't know it? You are working on an extensive production with many tracks that all have to be balanced individually. To speed up and simplify the mixdown process, grouping and creating busses in the DAW helps.
To help with this, Toontrack's latest expansion pack Buses & Masters EZmix Pack for the mixing and mastering expert EZmix 2. Double-platinum producer and composer Timofey Reznikov (of David Guetta and Dimitri Vegas, among others) has developed 50 user-specific signal chain presets that act like mix glue and create a holistic sound image.