If you're planning a trip to Walt Disney World, there are a few major costs that you will have to consider when deciding when to go, where to stay and much more. Here are a few threads on the biggest decisions that come with planning a trip.
Ticket types - see this thread for the various types of tickets you can purchase
Where to stay - see this discussion for on property vs off property hotels
Dining - see this post about types of restaurants, the dining plan and money saving tips
When to go - see this thread on the best and worst times to visit
Transportation options - see this post about how to get around on WDW property
And don't forget to read all of our strategy guides to each individual park, found in the sidebar on this site!