For me I find the higher the bpm the easier it is to focus on what I'm doing. The ambient/relaxing stuff just never seems to work for me.

This Laidback Drum & Bass playlist[1] gets a regular run out.

1: https://music.youtube.com/playlist?list=RDCLAK5uy_mhouxvxL06...

Do you know SNTS' set at Boiler Room Berlin? If not you are in for a treat: https://www.youtube.com/watch?v=_UYEOeyRm4E

Yeah, some days I also have this problem. Not sure what causes it but techno cures it.

I think it acts as a stimulant.