I'm nooo proffessional when it comes to eyebrow plucking, sometimes mine turn out looking justt how I want it and then I am too lazy too maintain the shape and can't get it how it was before.
But this is generally how I do it and it works for me; firstly, I take some scissors and an eyebrow brush. Then I comb the eyebrow hair straight up, but most of the time it doesn't stay there anyway. Then you take the scissors (do be careful) and snip all the hair that goes over the area where your eyebrow stops if the hair is combed down/ as it naturally is.
I think male eyebrow hair grows longer than female eyebrow hair and this really helps to make it look better. But be warned : do not over do it (don't snip any hair lower than where you eyebroe ends) it will leave bald spots in your eyebrow, trust me, I've been there.
And after this trimming sessions you just pluck the random hairs at the top of your brow, but just the random ones, don't make your brows thinner by plucking from the top of the brow.
Then go on to plucking the random hairs at the bottom of the brow , and try to enhance the shape your eyebrow already has.
If you can't see a shape you like in your eyebrow, then trace with something like eyeliner an outline of how you would like your eyebrow to look and pluck all the hairs that are not within this line. Just try to get both brows to look the same though. Oh and it is quite important to create a nice arch at the correct place.
I can't post a pic right now, but there are pictures on google that show you where your arch should be, where your eyebrow should end and where it should star.
Sorry for the long post. I hope it was useful