OK, so, being socially awkward at best and downright socially inept when it comes to dealing with pretty girls, I'm going to ask for some advice here.
Join the club! The most suave seeming Don Juan types are either faking it, or are so narcissistic that they are oblivious. Being human in itself is a diagnosis and should be in the DSMIV. Relax.
Be confident. And you can't fake that. But confident in a subtle way, nothing contrived. Every woman that I have dated has told me that they found my confidence sexy. (And I'm short, fat, bald, and ugly!) You have to realize you are worthy to court the brightest and prettiest lady out there. And I think we can all attest to the fact that you are worthy. If you can spare it, treat yourself to a nice set of threads and swagger a little.
Smile and be happy. All people want to surround themselves with people that are genuinely happy. I know it's tough for those of us that are tuned into what is going on in the world. Spend time looking at things of beauty, whatever floats your boat, whether it's flowers, rainbows, or ML's new gun. Prolly best not to mention you're a prepper on the first date unless for some reason she is too.
Even if you hate dancing, if you get the chance to go dancing with a date, DO IT. Make a fool of yourself, release some endorphins. It's a primal mating thing. Just don't get too sweaty! There's no such thing as a bad dancer unless you step on her feet too much.
Make mental notes of things you may have discussed with a lady you may like to date. Remembering something may seem trivial, but it shows that you are capable of intimacy. If she mentions she had to take her dog to a vet, follow up the next time you see her and ask how the vet visit went. And again, it's hard to fake that. If you genuinely like someone, you should remember something like that anyway.
Don't stress about it. Easier said than done I know.