Great tutorial on mono versus stereo

Yes a good video.  I think one good point is that if you are dealing with several stereo sources at once. eg electronic music. Panning them all into the same positions can make them less clear as a result.  So you can alter the widths of several sources and this in itself is a form of expression within the mix.  I tend to make at least one very wide as well eg a slow moving pad or something.  Listen to them (in solo) before setting their widths because some are nearly mono and are worth putting into mono.  It is good to have a few that are about half as wide.  You can pan a narrow width around to the left and right within the overall image.  Narrower sounds are easier to place in some respects.
 
But what has been mentioned in these forums is recording stereo instruments especially hardware synths.  And wrong advice in that it is best to record from a synth in mono and then apply stereo effects later.  A better way is to always record any stereo instrument in stereo.  Often the images that are coming out are very nice and well worth hearing and tracking at least.  You can always alter them later and even bring them back to full mono again and apply some other stereo processing later.  Sometimes a little stereo processing over a stereo sound works great too.
 
There are times when you may want to use 5 stereo sources and pan them all into the exact same place as well.  Suppose you want to make a very lush pad using 5 layered synths all in stereo making a slightly different pad sound.  (eg 5 synths per note)  It is good to pan them all to the same place sometimes as it still gives the immense sense of lush but the layers are a little vague to  pinpoint which is an effect you may actually want.  You could put all the 5 stereo synths into mono and pan them in five places across the image from L to R.  That will sound different to the first option.  You may pinpoint individual layers too much in that situation.
 
Most VST's are going to be in stereo too so it well worth auditioning them carefully around the time you are doing your mix. Then is a good time to alter the original stereo imaging perspective to your mix perspective.
 
Even experienced mixers can forget how multiple stereo sources are being returnd to a mix so it is good to be vigilant on those things.

i'm finding that the longer i mix, the more i get away from stereo effects,
and use mono reverbs and delays, and pan them with the panning of the individual track.
 
 

batsbrew
i'm finding that the longer i mix, the more i get away from stereo effects,
and use mono reverbs and delays, and pan them with the panning of the individual track.
 
 

Same here.
 
A little while back, I've even started building my balance in mono. In fact, I often forget that I hit the mono switch and keep working in mono until something brings it back to my attention, like a particular pan. Overall, I spend a lot of time working in mono.
 
Usually, if it works, it's only going to be better in stereo.
 
As for the rest, I tend to use the stereo tool in my DAW to constrain the stereo image of certain instruments (like overheads) to a certain width. I've been re-centering things quite a bit lately.
 
If I pan something all the way left or right, it's for effect or because I want it to really stand out. It's what seems to help with my mixes, though I can appreciate mixes done w/ a different approach.