Tutorio.com

There are plenty of techniques for doing masking, some uses channels, color range, pen tool and lot of times for those who has a tablet they just paint it with their brush tool.

For me I use free hand masking for those edges who needs additional details, I have here a perfect example of a photo which I bet you won't use your favorite pen tool or your free hand to pick the capsule.

You can find the high resolution of this source in here, a forum on photoshoptalent.com