Stage managing shakespeare is like stage managing any other show . . . the difference is that shakespeare shows tend to have the following:
1) Larger Casts and/or more doubling
2) Period Costumes, Props, Sets
3) More attention to text (so, dialect work, accent work, vocal work, pronounciation)
4) Fights, Dance and Music
Do get too hung up on the fact it is "Shakespeare" and have it be a mental block for doing the show - let it be just a big show, and treat it as such.
(This from someone who seems to stage manage nothing but Shakespeare . . . )