- Understand the time and place
Putting moves on that colleague of yours in the office might seriously amount to sexual harassment in the work place and you will probably get your ass sued or fired. It’s best to wait till after hours when you’re gathered at the bar for a few glasses of wine or any other place more relaxing away from work. While at work, you could drop a few, however, very mild hints. These could include smiling brightly, fetching her coffee, helping with her photocopy, helping her put together that presentation, etc.
Men, just do not get involved with anyone from work. The system is stacked against you, and one word from her will have the HR department summarily firing your ass.
Do not shit where you eat. Be pleasant to female coworkers, but never attempt anything sexual with them.
- Understand your target
This is a very vital one. Before you go chasing, take a few moments or even days (if you have this luxury) to figuratively size up your challenge. Is she putting out hints that she is single and searching, this could include smiling easily, dressing provocatively, paying you enough attention, etc.? Or is she totally off the radar, like flashing her wedding band in your face, barely smiling, obviously waiting for her date, etc?
Forget all of this.
Look at her. Is she attractive?
Approach her. Say something, do not fret about what and how she is going to interpret it or whatever. Just go and say hi.
Unless you are completely socially retarded, it should be obvious within seconds whether this could go somewhere or not.
Is she playing with her hair? Holding your gaze (never look away first) for longer than normal? Touching her neck?
Most women do this, consciously or not. Learn to recognize it.
Worst that can happen is that she was not interested. That is ok, and if your goal was to seduce, then bid your farewell when you realize this is the case.
- Look the part
To successfully flirt and score, you have to look appealing yourself. Be clean, dress well, smell good, brush your teeth regularly or keep a steady supply of breath mints.
You forgot one of the most important: lift, lift, lift.
Being in shape tremendously helps.
Besides looking good, you have to be confident or look it, even if you don’t feel very much so.
The mask of false confidence will very quickly fall. Whether it is given away by poor posture, supplicating unconscious behaviors, or misplaced words, your ruse will unwittingly reveal itself.
Get your lines right and keep it short. For example, when you walk up to a lady at the bar, don’t say, “How are you doing? What’s your name? Where do you work? Can I sit beside you?”
Forget lines. What you say does not matter so much as how you say it.
Be yourself and be confident. Be interesting. The rest is gimmicks.
A simple, “Please oblige me the honor of sitting next to a pretty lady like yourself.”
Definitely do not say this. Too supplicating, and redundant, she already knows you find her attractive if you made the move.
Then go ahead to order a refill of her glass.
Never pay her drinks. That is what every other guy does. But not you.
In fact, ask HER to buy YOU a drink! ;-)
- Go in for the kill
As the drinks keep coming in steady, introduce yourself and ask her about herself or how her day went. Make sure you do ninety percent of the listening and ten percent of the talking.
Do not listen to this. If you let her talk most of the time, you are in her frame. You should be leading and setting the tone. Talk about whatever is interesting to you.
Tell her a bit about yourself, but not too much. Be mysterious.
Act as if you’re deeply interested in what she’s saying and drop in a few comments, intelligent ones too, from time to time. If you listen well and ask the right question in a subtle manner, you will find out in time if she’s looking for a nice time or is up for something more serious like dating.
Do not ask about it directly. With time and experience you will be able to read such things inherently -- from such factors as how close she is sitting to you, whether her body is leaning in your direction, how often she is still holding the gaze for longer than normal, whether some well-placed light touching (on arms or hands, for instance) on your part was well received or not, etc.
- Close the deal
As you guys talk, there are a few points you should take note of. For example, lean in when talking to her.
DO NOT lean in while talking to her. Let HER do the leaning.
Try to brush her hair if it’s falling out of place. Do this gently and quickly. Ensure you make her laugh a lot and drop in a few hints she’s giving you the green light. For example, “your lips look so soft. I just want to taste them.”
Do not say anything of the sort. Forget words here, when it is time to go for it, you will know, at which point you do not hesitate, it will only psych you out.
Once you are reasonably sure she is also into you and willing to move things forward, be a man and move things forward.
If she laughs or encourages you to, make sure you do it before the night is over. Ladies do not like to be disappointed.
If she’s looking for a date, make sure to set up one too, before the night or occasion (it might be at a friend's gallery show or birthday party, etc.) is over.
tl;dr some good advice but mostly not, do not listen to women giving dating/sex advice to men in general :-p
Your advice is definitely better than hers.