If I save at my current rate I will achieve FI in 2022. If I had started saving aggressively sooner I would already be FI (I'm in my mid forties). I hate answering to other people and would rather work on my own stuff. FI will get me there.
Read the book The Simple Path to Wealth to understand the process. Or this blog post is a good start: http://www.mrmoneymustache.com/2013/02/22/getting-rich-from-...
Another great resource (read the sidebar and FAQ on the right) https://www.reddit.com/r/financialindependence/