In order to time your texts so that you convey your best self, you will need to be two things: genuine and realistic.
You probably shouldn't have given him your number in the first place. If you are really excited about the guy who is texting you, or if you are just excited to be getting any attention from a guy, you need to resist your temptation to indulge in communicating with him (anticipating his texts, reading them, replying, and anticipating the next one).
This excitement seems like a small thing; but when you are dropping everything immediately upon receiving a text notification, or constantly checking your phone just to make sure you didn't miss the latest message from him, you start to realize how much you are allowing a merely potential relationship to monopolize your priorities.
A final note: if a guy seems to be playing games with you, artificially delaying his responses or skipping texts (yes, guys do this stuff too sometimes), I still suggest replying authentically and realistically.
But after 4 or 5 late and unexplained texts, feel free to ignore him.
You've probably heard all kinds of suggestions from other girls about how long to wait before replying to a text from a guy you like.
Some claim you should always wait 15 minutes, others insist on only replying to every other text, while others still dismiss "playing games" as ridiculous and advocate replying however you feel like in the moment. It will either make you come across as needy and too easy, or else cold and too distant.
He's either a player or not interested enough, and either way you do best to forget about him.
As you notice the advice differs a little bit from guys to girls.
Furthermore, your authenticity will show a man your true self, while your realism will keep in check your tendency to be too forthcoming. This might be "successful" in the sense that it will occasionally keep a man on the hook for a time, but this is only because he wants to prove that you want him; it doesn't make him enjoy you any more.
In addition, the whole "hard to get" charade is far too easy to overdo, and you risk making yourself appear uninterested - or worse, cold and boring.
I've dated countless women and it has always amazed me how little they know about men.