You didn't get the number because you forgot to qualify? Who cares? It's not like the girl is sitting there with a checklist and will be like "well, you generated attraction and built some comfort, but you didn't transition from C1 to C2 properly, so even though I like you, I can't give you my number" !
Just keep going out and having fun with it. We teach the idea that you should do some warm up pranks and things to get yourself in a fun frame of mind, and not worrying about whether the set goes well or not, or about rejection.
Check out this video series, which can get you immediately started on how to do direct approaches with confidence, whilst having a great time!
http://www.sashapua.com/get-my-free-vid ... t-approach