Something neat you can put on a send to brighten up your mix a bit.
EQ with hipass around 2khz, some boosts around 10 / 12 khz, some a bit lower, around 2 - 4 khz. Use a M/S EQ and boost the mid and side differently. Also, make sure you're using a linear phase EQ because it'll be on a send, and you don't want any delay.
Next some stereo widening, I just use Utility in Ableton with the width bumped up to 150%.
Then some sort of exciter or saturation / harmonic distortion.
Finally, at the end of the chain, put some compression on it.
Once you've got that all set up, send your individual tracks to it in varying amounts. Sounds pretty cool.
Here's my setup.