As a British tourist in Orlando it can be quite tricky to find your way around as we are not used to the road systems and it seems difficult to get your bearings. Your best bet is to invest in a good map before you go. We have worked our way through several maps over the years but we find most of them lack enough detail as we are only interested in quite a small area so before purchasing a map it is best to make sure that it is particularly relevant to the themepark cente of the world! An orlando tourist map is your best bet and some of them are coated so that they are a little tougher and withstand a lot of use. One of the best map companies now offers an iPhone app as well which I haven't tried but I imagine would be quite useful.
If you are taking your UK satnav with you it is best to be aware that even though many will be able to locate Orlando maps they do not all run succesfully in American cars so it is probably best to hire one with your rental car if you think that is an essential.
Remember if you do get lost, don't stop and study the map as you become vulnerable. Alays drive to a petrol station or busy shopping mall before you pull over to work out where you are.