Using “by”

You can write means of transportation and communication after the preposition “by”.

Structure:
 by + a noun 

Examples:

a. I want to travel by airplane.
b. She prefers to sail by boat.
c. He agrees to go by taxi.
d. I promise to go to your city by land.

Another words 
used with “by”

By bus	By telephone	By choice
By car	By fax	By mistake
By subway	By air	By check
By train	By sea	By hand
By mail	By chance

You can also use the preposition “by” with verbs “-ing”.

Examples:

a. I enjoy by travelling around the world.
b. She can see the seals by sailing the island.
c. He will feel sad in the cinema by going alone.
d. My son will be happy by receiving a new laptop.