I'm in my early twenties and still having breakouts. I'm also worried about aging pre-maturely due to so many harsh acne products & not really taking care of my skin when I was younger... Is there something I can use Now to help prevent advanced aging in the future?
I certainly understand your concerns, being in my early 20s myself.
Wearing SPF during the day (not all of them have to be heavy, greasy, or smelly- try Shiseido's for extra-special textures and luxurious suncare fused into skincare!) goes a long way in terms of preventing lines and wrinkles and also preventing acne scars from darkening and marring your complexion later in life.
Choosing a time to apply your acne products, like benzoyl peroxide or retinol, is also key- try it at night, and let your skin rest during the day by not applying them then. Use a nice night cream on top (after letting the acne treatment soak in, of course) to be sure you are moisturizing and hopefully getting some anti-aging benefits as well. There are many lines, like Murad or Perricone, that have products specifically designed for anti-aging AND anti-acne.
Try to simplify and not over-stress your skin. A solid, consistent routine with a few basic products is better than a shelf full of items you forget to use or that simply are excessive for your skin. And a good eye cream goes a long way in helping to prevent crow's feet- it's never too early for prevention!