Since I have only experienced a handful of families' traditions of how they conduct their Sedarim, I thought I'd ask what others do.
What are some of the widely practiced customs for how to actually conduct the Seder? By conduct, I mean who reads when (eg., does the "leader" read everything, or do you go around the table, or do you call for volunteers?), who is responsible for various parts (eg., opening the door for Eliyahu), what is acceptable to skip (eg., songs if it is getting late?), etc.
Please cite sources if possible, whether they be ancient or contemporary (even a blog). I'm not so much curious about what the RaMBa"M (eg.) says we should do, as I am about what people are actually doing.