The problem with electronic music is that you can add several drum tracks, pads, leads, arpeggios, vocal bit, aux percussion, etc. Then you'll apply some efx and you have a huge mess. If you are really having issues and can't make a mix work, think about composition as well. Maybe two pads are not needed while that organ is also going on? Or maybe you're doing minimal electronica and this is not relevant ;)
I start with drums and bass and make them sound the best they can. With contemporary music they should be pretty rocking with a good amount of impact. Everyone talks about subtractive eqing - but don't be afraid to boost - although with electronic sound sources this is not needed as much as 'acoustic' music.
Finding what frequencies to cut can be done by setting your eq to a narrow Q and boosting the gain to about +10 or +20db. Solo the track if you'd like, then sweep through the frequencies where you suspect the problem is - the offending freq should stick out when you hit it. Once you've found it, widen your Q a bit and take the gain into the -5 to -10 area depending on the eq model (some seem to have more effect with lower settings).
Cut the lows out of some of your pads and lead synths. Cut some of the low out of the Bass synth until the kick is coming through nice and strong, then bring it back in a bit till you like the amount of fullness. I've gotten some raw tracks for remixes and was surprised how much low cutting I had to do to match the original track in the bass guitar.
Compare with recordings you admire to make sure you're not ending up going too far in any one direction. Lately it seems like alot of the electronic music I hear is waaaay compressed - especially compressing the bass using the kick as a side chain.
Mixing is a never ending learning experience for me - I've been at it for years, but still feel I could improve much.