Aquarius is used to giving it, but here's advice for you...
When people are asked what advice they'd give to their younger selves, it usually follows along similar lines. Aquarians take the advice early so they'll have no regrets later!
Be yourself. Don't waste time trying to be something someone else wants.
Stop worrying. All that angst you're feeling now will disappear (really)!
Be patient. Not everything has to happen ASAP!
Give yourself a break. Don't be heartbroken when things don't go your way. Life happens.
Accept yourself. You don't have to apologize to anyone for your clutter or your cellulite!
Never stop dreaming. Ten or a hundred years from now you'll still have too many things you want to accomplish!