What are some good treatments for freckles and blemishes?

When I was young, I was often told that I looked young even though I had blemishes.

As I get older, perhaps because I have more freckles and blemishes on my face, my skin looks dull and I look older.

If only I didn't have freckles and blemishes, I would look younger, right?

What is the best procedure to remove freckles and blemishes?