as soon as you get her number say you're going to send an sms to her together, like this
"hey gimmie your number, awesome, wait i have an idea, let's sms you something
....okay, it goes -> read it out to her as you type, make it seem like it's spontaneous, so pause every now and again <- (hey jess, i just met the cutest girl her name's jess too, you'd really like her, she has this strange odor but she's pretty fun, most of the time
talk soon xoxo)
Then ask if that's enough kisses and hugs for an sms, and whatever she says, do the opposite, so if she says that's enough xoxo's do some more, if she says that's not enough, just leave it as it is.
Every time i've used this the girl has sms'd me within hours and the flirting has been ....outrageous.