To better strengthen your upvote value. Only vote every 2.4 hours. Maximum of 10 votes a day. you can check your steem power here
https://steemnow.com/
or here
https://steemd.com/@robertaw
It is best to vote when you voting power is at 100%. From what I understand when you vote with less voting power... you are not helping the person you upvote.

I hope this helps you out... perhaps I will create a what I learned from steem