Getting Grounded in Philosophy - Where Should I Start?

[Ragnar]

If you want to give yourself a philosophy course similar to what you would get freshman year in college I'd recommend two books.
An Introduction to Philosophical Analysis by John Hospers and The Art of Reasoning by David Kelley.
These will give you the basics and introduce you to the issues in philosophy and logic.
Then tackle the big boys.
Full disclosure. I work with David Kelley at a philosophy think tank.