No man, all that advice is wrong. These people are all obviously virgins and trolls.
Number one is you NEVER ask the girl out if you like her. You'll be too nervous to do it competently. No. First you have to find out where she lives. Follow her home a few times, but don't let her see you. You just want an upper hand, not her attention. Once you find out where she lives you can commence step two, which is...
Step Two over here! Yeah, now you begin the watching phase. Once you've seen her house, now you can start gathering more information about the sweety in your life. An easy way is to start going through her garbage, often she'll leave important bits about her life you can memorize to use in any conversations you may have. Another way is to buy an old used van and park it somewhere near her house where you can watch. Try to get a good angle for high powered binoculars so you can see through the windows and study the patterns of her family.
If at this point nobody has noticed you, great, because you are even closer to winning the heart of your unknowing love. Step three is a good tester phase for your love though. Basically, your going to want to start following her parents and siblings around, you know, get a feel for how they go about their dayu. These people after all, are your future in-laws. Try to mark the times when they are all gone and she's home alone. That's romance time.
Step four is more intense that step three but only because of the amount of breaking and entering it involves. I personally have had hundreds of girlfriends and they love it when I surprise them home alone while they're showering, completely defenseless and vulnerable. I assume you're going to want to do the same. Try duct tape over a basement window, if your skinny you can slip right in. If not, the backdoor window and some more duct tape is all the key you'll ever need.
After you've broken in, crept through the house and killed any of her pets you've come across, the time is just about ripe to confess your love for this lucky woman, so I hope you've remembered your ski mask and big knife.
From then on it's all you big boy, good luck!