Been there, done that, starting with $7k.
1. I have an account at IB.
2. I trade penny stocks, but only trade those that have exploded up and crashed down, then I buy the bounce. Only use daily charts. I made more money on penny stocks than playing large cap stocks this way in a very consistent manner. You need L2, and you want to get in at bid. You must have good T/A skills and know how to adapt that to work for penny stocks. The chance for you to pull that off, I would say, close to zero.
3. I daytrade on NYSE gap down plays.
4. I daytrade slow moving stocks like SUNW, JDSU, and SIRI with size.
5. You have to go all in, but keep the trade in stocks like INTC, MSFT, CSCO, stocks for prop traders, but play it for intraday swing trade. Until you figure out how to pick tops and bottoms before confirmations from other indicators, your chance to survive is really low, but you also minimize the risk of ruin.
6. Do not play news related stocks.
7. Try to diversify a bit in high beta stocks below $20, and get 100 to 200 shares each, provide that you know how to trade them. Use longer time frame charts, like 60min and daily chart would be the key to hold three positions at the same time.
8. Always check the earnings date, you could get killed by holding overnight. Or you can use it to play the end of day earnings anticipation run.
Or you can choose to go all in on stocks like NT, hope that it will double by holding it for a long term trade. Do it two times, you have enough money to daytrade. Then you will lose the real daytrading experience, and probably get blown out right after reaching $25k for trying to be a daytrader/short term trader.
I've done it without playing options and futures. It really depends on your skill. Besides, getting blown out once is actually a good idea to get yourself to follow the basic trading rules, from my experience...
Hope this helps.