OK. Everybody tell me how long do can you use your iTouch before you have to recharge. So far I have only apps on my iTouch but at that after a couple hours (I'd say 5hr.) of using them the battery is down to halfway mark .Yeah, I turn of my wireless and fetch data.

You should always let it run completely out on its own before charging it again.

I wouldn't completely drain it every time.
The first time is important to drain it and completely charge it, so the battery's memory will be set to minimum and maximum.
After that it should be fine charging it at any point. The thing is, batteries can be charged a certain amount of time before they're useless. So try and take advantage of as much battery as you can.