Here are some little things that might speed you up when working on a Mac.
1. View hidden files in Finder
In terminal type:
1defaults write com.apple.finder AppleShowAllFiles TRUE
To hide them again:
1defaults write com.apple.finder AppleShowAllFiles FALSE
2. Manage clipboard from command line
To copy the output of a parameter you can use pbcopy:
1pwd | pbcopy
The result from pwd will be [...]