You don’t need to worry about interrupting her because if she’s asleep or busy, her phone will probably be turned to silent.
After you’ve scored a girl’s number, the very first text you send should be a reminder about how happy you are to have met her or how much fun you had the day/night before.
Whichever disastrous message outcome came from combining mistakes ten (wazup wher chi at) and three (send me a pic of that ass), chances are she can no longer take you seriously—or thinks you’re a pig.
If you can’t achieve straight up self-control, at least there’s an app for that.
If you have feelings to share, pick up the phone or run the risk of sounding pathetic.