Some people measure their life,
On the accomplishments they've made,
But life should be measured by the moments,
The memories can last; the glories fade.
^^ I think it should be their lives instead of their life.

The message was very vivid although just an opinion, i think it could have been powerful if you would avoid repeating words which were very obvious here.

On the otherhand, this poem already emphasized a very enlightening message.

Good job.