sorry for late reply, still preparing for the other parts.
Mmmmm foreshortening, I guess it depends on how close it is from where it's viewed at? try experimenting on how exaggerated you want it to be while still maintaining proper proportions?
Can't really say much about it because I don't have much experience in it,
though when doing it..(prolly you've heard this a lot of times) is I just 'feel' it?
I mean, when in drafts, it kinda 'feels' right, then when linearting it 'feels' off so corrections are in order(a lot), even when coloring it.
on practicing it tho, you might want to watch
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I like the method he conveyed there and his usage of references.
hope it helps