Day Trading, How?

Hi all fellow traders. I have a dumb question. Can anyone please enlighten me? My question is simple. How can you do the day trading when you need T +2 days for the settlement? I know some broker allow you buy and, sell directly without waiting the settlement once. But, if you want to do another trade after that, you still need T +2 days for the money, don't you? Does any broker allow you to trade as many as you want? OR, all you, day traders split the funds and buy & sell small qty shares each time? OR, you guys trading CFD? OR, using a margin loan? Sorry if someone asked before these questions. I couldn't find much answers I need from web or HotCopper. Thanks in advance who answers.