Get to know the standard library
Many Go resources and people recommend using the standard over 3rd. party external dependencies.
I believe it is a good idea to evaluate the options in the standard library before just starting to use the most spiffy and shiny.
A nice over view of the standard library is available here.
This is an interesting additional read serving as a walkthrough.
Since I am still learning Go, I will add notes on the standard library here as I accumulate pick up some more experience.