I'm assuming Disney World. I've never been there, but everybody I've talked to says you need to plan on a whole week at least to see everything, it's huge. I'm not sure how it is at DW, but out here in Cali, we try to go during the school year and on the weekdays to cut down on traffic and line waits. Try to plan it around the weather too, meaning, not during hurricane season in Florida, and not during their hottest times so you are not sweating your asses off. Actually, does florida even get that hot?
Jipped over at WCBB just went with his family this last year and posted about it on the off-topic forum over there.