My usual chain:
1. Master compressor (PSP mastercomp). Treshold 3-6dB below the peak level of the track, depending on how busy the mix is. Attack from very low (2ms) to about 50ms, depending on the dynamics. Sparse transients -> longer atk. Release to go with the groove of the kick and snare, maybe 200ms to 800ms. If the kick is powerful, i adjust the sidechain to ignore the kick dominant freq.
2. Stillwell 1973 eq for adjusting the highs, upper mids to taste, here I A/B the most.
3. Sometimes PSP mixsaturator in this slot with extra mild settings. Depends on a lot of things. Mainly the 'clinicalness' of the mix. If it's very synth driven, i apply a bit more. If I use a lot of samples, I might skip the saturation.
4. Linear EQ for cutting off above 17-20Khz, again depending on the drums mostly. Also cut lows below 20-30hz, depending on how deep the sub goes.
PSP Xenon limiter, push the peaks down and get the RMS in the loudest parts to about -10. Release from 50ms to 250ms, depending again on the transients and main drums. With a rigorous A/B regime b2b analyzer analism, I might push the bass freqs up or down a few dB.
5. Voxengo SPAN to keep an eye on the extreme subs.
It's really hard to do a master in the same space that you've mixed the track, so I usually bounce the track to wav, carry it around, listening with different setups and adjust accordingly.