DO NOT OVER STRETCH. Listen to your body, this shouldn't hurt, if it hurts you're in too deep of a stretch, which could cause a strained or pulled muscle. Be careful, do these at your own risk.
Do 15 minutes of stretching twice a day. In the morning, and in the evening.
After about three days of doing these stretches, i have noticed a SIGNIFICANT increase in flexibility. I'm really impressed with how quickly these help.
If you're dedicated your gonna have your splits in no time!