Keeping VP always above 90% is a good idea to make sure we always operate at enough power. However sometimes I found out when I surf Steem a lil more active than usual, I would cast more votes than usual and bring my VP down.

I chose not to vote later on while keep reading new posts but I felt guilty doing that as those quality posts definitely need every reader's vote. Though my VP is not significant but making wise use of them makes me feel good.