Selecting and masking in Photoshop
Accurately selecting and masking tricky objects in Photoshop is without doubt one of the most fundamental skills any photographer or retoucher must learn.
In this really helpful Youtube tutorial, Jesus Ramirez of the Photoshop Training Channel will walk you through just that. He shows us how to select and mask a girl with long flowing hair firstly from a solid colour background, and then how to do it from a busy background. Even if you don't do composite work using people, I can see how this would work with other subject matters too, such as trees against the sky.
This selecting and masking process has lots of steps. If this is your first time using this technique, as it was with me, you need to be patient. It's going to take time, trial and error to get the level of perfection Jesus obtains. However, if you do this kind of work regularly it will be time well spent.
So, go get yourself a cup of tea or coffee, make yourself comfortable and learn how to become a selecting and masking guru.