How do you indiscreetly flirt with someone?

Well usually,I just try to flirt using laughter and jokes.It works if the girl's alone or with friends.But I think I need a fresh start since I've been using that for awhile now.I wanna know how to flirt indiscreetly since,if I do it infront of the girl's friends or my friends,I wouldn't want to be branded as a flirt.That's all.Thanks.How do you indiscreetly flirt with someone?
The site below has a book on flirting and if you use the code


25off


as the discount coupon code, you get 25% off.





Not sure how long the discount code will remain but when you get to the checkout, just put it in the 'discount coupon' section and it will tell you if it is still valid before you have to pay.