First of all, track ultra tight and ultra tuned. New strings, new drum heads, fresh vocalist.
Use DI to split the signal and check tune while the guitarrist/bassist is playing. If it goes out of tune a cent, tune that part.
Make shure the song arrengment is consistent.
When everything is tracked:
Edit the shit out of its parents. GRID ON THEM. Edit all silence out. Cut in a musical way, do not chop the transients. Light compression is good here (I mean ultra light compression).
Add more drum samples now. Sometimes I end up with 4 different snares.
Consolidate and export all single tracks and import to the mixing template (I have one in cubase with all plugins I use most ready).
All single tracks has:
-Trim Plugin (I use Cubase imput trim)
-VCC
-Equality
(I add more plugins/hardware then)
Usually triplicate the bass track. (Bass, Grit, Dist)
And assign them to all groups:
Lead Vocal, Vocal Dist, Backing Vocals, Drums Bus, Snare Parallel Comp, Kick Parallel Comp, Distorted Guitars, Clean Guitars, Bass, Synth, Strings, Keys.
All Groups has some plugins ready:
-VCC
-Bus Comp
My mix bus has SSL comp with -4db max reduction, Attack .10 or .30, Release on auto. Makeup +4.
Now ajust the trim on every track and then push all faders to "0".
First thing I do is to take bass tracks up and mix it to its bus. -18db max on bus.
Next I push the kick drum fader up and mix it with the bass and make things coesive.
Then I add lead vocals, mixing with 3. Next I push the lead vocal fader to 0 again (this has a purpose).
The next step is to add guitars in mono and mix them with the kick, bass. When mixed with clarity, pan the guitars.
Then I add snare and cymbals. Ajust your parallel comp if you want it. Mix everything. Add all other tracks one by one and make them sound good without panning, when you pan they will sound great and clean.
The last thing I add (again) are the lead vocals, so I can put them on top.
*** MIX IT QUIETLY. Normally listening to it loud means that its sounding like shit, and you can't make it sound good at low volumes. You will become Biased.
*** Each 20 minutes worked, 5 minutes resting ears.
*** Listen to great mixes and compare clarity.
*** Listen to it on the next morning.
*** "5. Listen to it 500 times (and on different sources) and start to think I am completely worthless".
This is one of the aproaches I do.