Learn one Chinese Character a day - 片

What is the meaning of 片? Let us see two pictures and we might get some idea out of it:
Seal Script of 木 - 
Seal Script of 片 - 

It is clear that cutting wood (木 - ), we will get 片 - . What will we get by cutting wood? Plank or Board.

Yes, 片 means Plank or Board or something thin, flat.
Chinese language normally uses same character for noun as verb as well.
片 also means cut something into thin & flat pieces, like 片肉
As a Plank or Board cut from wood is usually small, so 片 is extended to mean a small area or space.
片is later used as Chinese Classifier to count something flat or a area.

Let us examine 片's evolution history: (image get from http://www.vividict.com)

Learn one Chinese Character a day - 片

We can see that starting from Regular Script , its way of writing has been finalised.

Now let us enjoy a Chinese calligraphy as usual with 片 inside:

两岸青山相对出，孤帆一片日边来