I've already done some things that people tend to put down for goals. I've traveled extensively. I wrote a novel. I've got more the the usual share of education. I put some money in the bank. I was a true believer for a while, then thought better of it. I'm frequently amazed at how much I've learned, and annoyed by how much I still don't know.
Life forces some imperatives on you -- eat, sleep, reproduce, etc. It's basic stuff, but we can all agree on it as a goal. However, having a complex brain complicates things. We're reasoning creatures, so the only real goals we have are what we make for ourselves. Goals issued to us by decree don't really inspire us to work.
So what's worth doing? I think it's all but provable that increasing happiness and reducing pain are worthwhile. Most living things avoid pain, so it's a fairly universal drive. You could spend your life trying to cure diseases, or build technology that will help your children (and others) to live better lives. That's complicated stuff, and I'm not sure I have enough time left to even begin with it.
You could try to make governments better for the people of the future. Unfortunately, human nature is very similar to the behavior of the other apes, so anything beyond simple dominance hierarchies tends to elude us. We frequently see no farther than our next meal (as we evolved to) though there are notable exceptions.
Making better governments requires making better people -- teaching them. I've tried that in the past, and I can say that I have little talent for it. If you do, then I've nothing but respect for you, but it's a thankless job. I'm no teacher, and even Buddha didn't manage to enlighten everyone.
I don't consider my life to have been wasted, but most of it is already over. I honestly don't care if anyone remembers me, and I don't believe I'll be judged for my actions, but I'm a pretty harsh critic all by myself. If my heart was weighed against a feather right now, I think I'd be just a bit on the lighter side. At this point, I think I'll focus on doing as little harm as possible.
A man once asked a teacher if there was anything better than prayer. The teacher advised him to sleep late -- that would keep him from doing anything evil.