Don't let her see this app in your phone.
hmmsk
Send your first text within 24hours of meeting her so she remembers as much as possible from the initial interaction.
hmmsk
If you meet her during the day (day game), send the first text within 30 minutes of meeting her. 
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Use callback humor. Callback humor is when you refer to humorous topics or events that happened in the first interaction. Using callback humor will bring her back to the same emotional state she was in when you met. 
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Use nicknames. A great way to use callback humor is by using a playful name that you called her from the first interaction. Examples: "crazy girl", "sassy pants" "punk rock girl"
hmmsk
An awesome way to really create a lot of intrigue and sexual tension is to save your name in her phone using a cocky or sexual nickname. After you get her number, call her phone and save your number in her phone as something creative and funny. Examples: "Sex God", "Sex Ninja", "The new crush", "Man of your dreams:, "The Booty Call". 
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If she didn't save your name in her phone, or you saved it for her using one of the above nicknames, then make sure you sign your name on the first text to avoid her wondering who you are.
hmmsk
When sending a text that could be misinterpreted as rude, mean or negative, use emoticons so she knows you are just joking around.  Examples of emoticons:  :)     :p   :-)  =)  =}  =]   
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Avoid using the ;) emoticon as some women think a "wink" is creepy. I know it doesn't make any sense, but we've heard women say this a lot. 
hmmsk
Be fun, flirty, random and interesting from the start. Hot women get texts from guys all day long, so you have to stand out from the herd. Intrigue her and make her more curious about you from the very beginning.
hmmsk
Keep everything fun and playful, but also show different sides of your personality. Tease her, lead her, make jokes, and sometimes just be more direct and genuine. 
hmmsk
Exeption to the rule...foreign women. Don't use a lot of slang, abbreviations or anything that has multiple interpretations with foreign women. Women that have trouble with the English language probably won't understand what you are talking about. Tone things down, and be a lot more basic and to the point.
hmmsk
Don't ask too many generic questions. Too many questions are annoying and what women are used to. When you do ask questions, ask in a more interesting way. Example: Instead of, "hey whats up?", you could text "hey goof, what are you doing... besides building my shrine? :p"
hmmsk
Don/'t try to impress her through text.  Trying to write a bunch of information that you assume will impress her usually has the opposite effect. Leave your long DHV (demonstrations of higher value) stories for when you are on the phone or face-to-face. Remember women hate guys that brag. 
hmmsk
Avoid writing super long texts.  The person contributing and putting in the most effort is the one that's most invested in the interaction. So, if you write really long texts it shows that you are overly invested in her and often comes off as needy. 
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Don't use texting to build comfort, rapport or commonalities. Save that for the first date. 
hmmsk
Attraction dissolves over time.  The idea is to use text messaging to maintain the attraction that she felt for you during the initial interaction.
hmmsk
As with any principle in "pick up", don't overdo it. Anything that is used too often will get old and stale.  For example, if you constantly tease her and bust her balls, it will lose the effect and she will actually start losing attraction for you. 
hmmsk
Use emotional spikes to boost her buying temperature before going for the date. What we mean by this is don't go for a date out of the blue ("hey lets hang out"). Instead, provide an emotional spike using humor, jealousy, fun or intrigue and THEN go for the date. 
hmmsk