When navigating crowds, I just go with the tried-and-true strategy of veering left instead of right whenever there's a parting of the ways (or a parting of the crowd). Left-hand turnstiles, left-hand pathways, etc., are nearly always less crowded, due to the natural tendency to "keep right." I wouldn't dare step on anyone, regardless of whether their slow speed annoyed me -- what if I caused somebody to fall and hurt themselves? It's a family theme park, not Nascar!
One Disney skill my family has honed (trivial, but a stress-reliever): navigating counter service restaurants, with one adult (me) taking everyone's "order" and waiting at the cashier while the rest find a seat. Everyone has a job: DS gets the napkins, straws and condiments. DD helps scout out a table, reports the location of the table to me while I'm waiting in line for our food, and picks up any drink cups, which she brings to DH to fill and deliver to the table. This way, by the time I have the food in hand, I don't have to wander around looking for them, we're totally ready to eat without anybody having to squeeze in and out of a booth to go get something, and we can dig in while it's still hot. Plus, the kids get to feel like they're integral parts of an organized "mission."
Another random "skill" (more of a tip, really): studies show that almost every patron using a public restroom (at Disney or elsewhere) skips the first stall they come to, because they assume that it is the "most frequently used." Because so many folks make this assumption and bypass it, the opposite is true, and the first stall is generally the cleanest and least-frequented. (The most-used are, of course, the second stall -- "stall #2," if you will -- and the furthest stall from the door, usually the largest, handicap-accessible one.)