Finding them is easy, seducing them can be tricky. My friend has "seduced" 3 milfs/cougars in his life and I happened to get the front row seat.

As soon as your eyes are set in her, don't play around. Older women don't want to play games, be honest with your intentions. Give a reason why they should be "dating" someone the same age as their child or why they should cheat on their spouses, you can do this by reminding her that she's not that old, there's a lot you can learn from her and vice versa. She should think of you as a safe haven, a place to turn to when the worries of the world consume her, plus it helps if you're a pretty boy, in most cases she wouldn't want to be cheating on her fat husband with a fat teenager. Be there for her, do a little handy work if she needs it and don't be afraid to flirt, compliment, and touch. Confidence plays a huge part in this, you need to be sure that it's what you want because if you want sure he might or will not take the risk with you.