Using the instructions from: http://docs.continuum.io/conda/intro.html
Open up a command prompt, and run:
conda create -n py33 python=3.3 anaconda
You will need to enter Yes to go ahead.
In Eclipse go to:
Window \ Preferences \ Pydev \ Interpreter – Python
Add a new Python Interpreter for Python 33 in Anaconda (e.g. my new environment was at c:\anaconda\envs\p33\python.exe)
To use with a project:
Right click on a project and go to Properties.
Under PyDev – Interpreter/Grammar, select your new interpreter.