Day trading requires more money than just a deposit, though. Get setup with a good computer, one or two monitors, a trading platform and data feeds. With many brokers the data feeds for various markets cost money, so pick a market and stick with it. There is no reason to pay for data feeds you won't be using. Also, a consistent income isn't likely during the first six months to a year, so save up for living expenses if attempting to day trade as a primary income stream.
In either of the two market extremes, the bear market environment or raging bull market, swing trading proves to be a rather different challenge than in a market between these two extremes. In these extremes, even the most active stocks will not exhibit the same up-and-down oscillations as when indexes are relatively stable for a few weeks or months. In a bear market or bull market, momentum will generally carry stocks for a long period of time in one direction only, thereby confirming that the best strategy is to trade on the basis of the longer-term directional trend.
Assess how much capital you're willing to risk on each trade. Many successful day traders risk less than 1% to 2% of their account per trade. If you have a $40,000 trading account and are willing to risk 0.5% of your capital on each trade, your maximum loss per trade is $200 (0.005 x $40,000). Set aside a surplus amount of funds you can trade with and you're prepared to lose. Remember, it may or may not happen.