I'm absolutely terrible at mastering...

[deadly_habit]

i'd say the opposite, if you want to make money in music beyond production learn recording, mixdowns and mastering. having a full arsenal is great, especially when you have a bunch of mics a mediocre board and can record a band and mix em down. so much more money in it and more knowledge. lemme put it this way, ive made so much more doing production tutorial vids for one synth than all gigs and releases combined. and recording bands and mixing em is just icing on the cake, and it's so fun if you like the content.
ie: i have a released tune that demonstrates what i talk about in a session about say filters or modulation, i make more teaching people how to use em.

Where are said production tutorials about said synth?

i contribute stuff to massivesynth.com
think he just sent a 30 min vid i did on routing to all subscribers

[RandoRando]

learn to get the mixdown on point, i mean everytime you make a new mixdown. export it below odb and listen to that shit in the car, on your ipod, in a friends car, any stereo. make sure it sounds good.

ten for mastering, be simple. your not a mastering engineer so just do basic things. i would recommend ozone since it puts it all there for you.

all i do is subtle mid/side EQing. Stereo widening. sometimes multiband compression. and then some limiting to make it louder.

dont worry about making your track loud. make sure it still has dynamics and your drums have transient punch. yeah the loud tracks on your ipod grab your attention. but they sound like shit on a good system.

brostep is okay to make LOUD. but keep in mind you have to mixdown down with LOUD in mind. otherwise your just squashing life out of it.