Some very basic tips & observations for beginners, from my experience:

If you are talking and a girl asks your name before you ask hers, it is an Indication Of Interest (IOI) - this doesn't mean you are getting laid instantly, but it's a start.

Never bring up if a woman has a boyfriend or a husband first before she does.

If a woman does bring up her bf, fiancee, husband -- ask her how the relationship or her love life is going -- that will often tell you a lot about if there is a chance -- [edit: or just completely ignore that she said it]

Stay out of the friend zone by letting a woman know early on that you are interested in her physically -- you can be friends later. Don't be afraid to do this, it is in your nature most likely and to do otherwise is repressing it.

At a bar or party, if a girl says "let's get shots" or something along those lines, she likely wants to get 'wild' and maybe hook up with someone that night.

In general, the less you care, the more likely someone is to pursue you -- particularly when a rapport or connection has already been built. So if you are willing to cut off communication or walk away from someone/something/situations, they will be more likely to come looking for you than someone who smothers them or a needy person.

Learning pick up/seduction is often completely different than learning how to be in a good relationship. In fact, your relationships may get worse when you learn how to pick up women - at first.

Some of the methods and techniques that you see on this sub and elsewhere are extremely powerful on some people, be aware that a woman can become "sprung" from it and the animal within her can emerge. This is usually a good thing, but keep this in mind with your friend's girls, co-workers, married women, etc. Also can create mild or various forms of female stalkers, for lack of a better word.

Even if it doesn't work at the time, planting a single seed of your physical attraction to a woman (and exhibiting your male sexual confidence by doing so) can sometimes cause a "timebomb" effect where that woman finds you at a later date, sometimes much later.

Any heartbreak you have will fade over time - there are other ways to speed the healing, but time will eventually fade it. You will get over that lost love or whatever it is.

And the biggest cliches of all, but they are true -- you can't get a hit if you don't swing the bat & the more lines your throw in the water, the more likely you are to catch a fish.