I'm not into techo-acid-electro whatever and i play my music live, so i guess my comments won't be much as far as 'secrets from the studio go' but still:
1) Practice makes perfect.
2) Make it sound good through your regular live amplification rig first. Then,
3) Record with room reverb and other imperfections, putting quality mics right by your amps.
4) Smoke pot, it will prevent you from getting too complicated in your mixing and mastering.
5) You're better off making a humble but well-balanced mix then maxing out bass right at mix and making it unlistenable once on CD.
6) f**k studio monitors, in fact, f**k any high-end listening gear. You want to make the mix good for average electronics. An amazing mix on 5000$ monitors will sound ordinary at best on regular gear.
7) Don't fear experimentation, old busted gear can sometimes yield amazing sound with the most honorable quality: personality.
Obviously these comments aren't aimed at the more sophisticated music producers and audio workers who make music to 'sound professional', but rather those who just do this for fun, don't have a huge record deal or aim at mainstream success.