See here:
Pick Transportation/Walking Paths from the Category menu - it will show you the boat docks in the Epcot area, walking paths between Epcot/DHS and those resorts, between MK & the Contemporary, etc.
Buses are pretty self-explanatory - there are bus stops @ all the resorts and all the parks.
The ourlaughingplace link above is inaccurate and I don't recommend it anymore. I can't speak to the other link because I have never looked at that.
Update - that mouseplanet is out of date by a lot - refers to Hollywood Studios as MGM (that changed ~3 years ago), WL to MK shows boat but does NOT show the bus option, and (just noticed this) - LOL - it refers to the Disney Institute. DI is now SSR since ?2004?. Definitely don't use that chart. And I hardly checked any of it.
ha ha - it gets better - gives transportation to River Country!! Closed in 1999.