Retirement - what does it mean?
In my books, retirement isn't doing nothing. It's doing what you want to do rather than because you have to earn a living performing a task which may or may not bring you any satisfaction.
In order to do as you please, (within the boundaries of the law of course) rather than what you are being paid to do, you first need to achieve financial independence. This term causes much confusion too. I take it to mean what it says... ie that you no longer have to depend upon regular employment in order to fund your lifestyle. You are independent of others and are not beholden to any organisation or person when it comes to money.
Everyone is different so there's no fixed threshold that defines what financial independence is. What's enough for me may well be far too little for you. More of that later.
How is financial independence achieved?
1. Saving as much as possible with the hope of achieving your goal. (very difficult to achieve in this day and age)
2. A combination of saving and investing in the enterprises owned by other people. (better than just saving but not ideal)
3. Investing in yourself and creating wealth on your own. (The best method of all and in my opinion, less risky than investing in 3rd parties)