| | Re: Big Mess!!!
There exist improperly built apps that monopolize the CPU or take a lot of memory, leaving other apps little to work with. Maybe you can tell us which apps these are.
You can see which apps are currently running by pushing and holding the "BlackBerry" (menu) button. Normally you should see the messages, "home", browser, BBM and phone apps and nothing more. Close the others (you don't need actively running).
Otherwise, try pulling the battery out (and then placing it back in) to force-stop any rogue apps, then see how the device behaves. If it behaves well, it is one of these apps. If not, there is still a chance that it is some sort of an integrated app that starts with the device - try uninstalling (those).