What do you do when you get off on the wrong foot after meeting a woman? Either you were off your game, didn't make a good first impression, whatever it may be.
I've tried different techniques that I've heard- start off from square one, give up on the girl and such but to no avail for the most part. Usually I try to pick up from square one but it's hard to do that when the woman has already lost interest.
Any other ideas? Maybe something I'm not doing correctly?

Bump....no replies nor insights?

You dont have to go all the way back to sq. 1. Simply take a step back and asess your situation together... are u A)aquaintance B)Friend Zone C) none of the above
No matter what your position is, you can ensure that you start from the right step. Dont give an excuse... i was tired or whatever... "Hey, wasn't myself when we last spoke... this time is your adventure... Ill be interviewing for a new sidekick!"..

Just be square with her while still playful and you will pick your interest up where it was left off... then you can escalate with the newfound inflated sexual tension

Gotcha, I'll have to give it a try. Usually it's an aquantance; the one I'm working on is a girl I knew when I was younger, met up with her again. She was cool, knew my name after like 13 years, gave me a hug at the end and said we should hang. Txt'd her a bit then it just kinda faded out since I didn't txt her for a couple weeks (I was always txting, wanted to give it a break and see if she would initiate txting, but no).

So I'm trying again but she hasn't replied to my txts the past few days, no matter how playful/colorful I've made them seem.

The best way to get back on track in your situation would be to go out and meet other girls.
Your girl needs a little bit of time. You couldn't hold her interest the first time, so I suggest you go out and meet girls, and learn how to keep the interest alive.
Once you do that, I promise you, you will have a clearer mind of how to get this girl back...if you'll want her back by then.