Sometimes you want Emacs to start up in a directory, other than your home dir. You may have a project you're working on or you want to work a set of files in special dir.
You can easily achieve this by adding an entry to Emacs config file which resides in your home dir.
Open the dot.emacs file using any plain text file editor (emacs?) and add the following:
; Start emacs in project directory
(setq default-directory "/home/stray/projects/")
Save your .emacs file.
Close and restart Emacs for changes to take effect.
Here I used projects as the directory Emacs will open in. You give it any directory name you wish.