As Kenny Rogers says, you gotta know when to hold 'em, know when to fold 'em, know when to walk away, and know when to run. Wise words, and very applicable to the forex world. Knowing what to do and when to do it will come with experience. You have to give yourself time to develop a feel for how certain pairs react. Time will also make you a more patient and disciplined trader.
Above all else, don't trade real money until you can trade like Kenny could gamble. A demo account is your best friend. When you've doubled your demo account three times over, you're ready for real money.
Also, check out this thread (if you haven't already): http://forums.babypips.com/newbie-island/66707-my-trading-dramatically-improved-when-i.html
Lots of good stuff there to help improve your trading and get those stop losses under control.