With a cash account, you can make as many trades as you'd like, even with an account under $25k. The PDT rule doesn't apply to you if you have a cash account. However, having a cash account has its cons. You have to trade with settled cash. The SEC's cash settlement rules state that when you convert assets or liquidate a position in your account, you can't use the cash for two whole days after the day of the transaction.

Another trick to make more than three trades a week is to open multiple brokerage accounts. With two brokerage accounts, you can make six day trades per rolling five day period. Add another one and you can make nine! This is something that many professionals and educators recommend, but you need to be careful when opening multiple accounts. 

If you are working with a very small sum of money, this strategy might not be right for you because you would be splitting your money up into even smaller amounts. This could result in a slower gain rate. It would just be smarter to have one account with all of your money. If you have a little more money to work with, an amount closer to $25k, then you should definitely consider having multiple accounts. Commission free trading is now offered by many brokerages so that isn't something to worry about. You can enjoy the benefits of no commission and trade more by using this strategy.

There is one more issue with opening multiple brokerage accounts that applies to every trader no matter how much money you have in your account. Keeping track of your cumulative positions will be difficult, and you won't be looking forward to tax season. You'll need to gather lots of documents and you'll find yourself struggling to stay organized. If you think that you can handle keeping track of everything, then this isn't something to worry about but still something to keep in mind.

If you use an offshore broker, you'll be able to avoid the PDT rule in addition to some other rules and regulations. Plus, by using an offshore broker you can also benefit from some extra leverage. Here's a list of the top offshore brokers out there:

If you don't want to try out these strategies, it's okay to just keep your one margin account too. In fact, having one brokerage account and having to follow the PDT rule might help rookies. Beginners who don't have much experience will learn from the PDT. The rules can serve as discipline. Also, you might not be very good at trading right away and the limit will stop you from losing too much. Even if you can not avoid the PDT rule, you can still do little things to maximize what you have and make the most out of it. Staying away from mistakes and keeping a few things in mind can go a long way.

Always stick to A+ setups. Strong setups are essential, and that's something all traders should know. A common mistake to avoid is holding trades overnight. It may be tempting sometimes, but don't do it. When holding overnight, you're risking a lot and you can't control the next day's open. Just avoid this risk all together even if it means using a day trade. 

When trading, always take your time frame into consideration. If you have under $25k in your account, you can only make 3 trades per week. So why would you trade on a short time frame? Trade on long term intraday charts instead. Obviously things will move slower, but that isn't a bad thing at all. You'll be using your three trades wisely if you aren't trading on a short time frame.