for me the whole point of texting game is to build a small thought of me while the im not meeting with the girl, thus should be light and fun, cause if shes beauty ill assume that im not the only one who text her, so at the very least should be fun, and i wouldnt recommend interrogating questions such as "what r u doin?" "where do u live?" or "what do you do?" rephrase it

. the best way to text is 1 hours after you went somewhere out with the girl, tell her you had a good time n stuff n you would love to meet her again on certain schedule.
But to answer your topic, i'd say trials, errors or girl friends (older than your target).