Don't revoke your upvote if you have already upvoted something because your vote power will decrease anyway. For example if you have upvoted some post with 100% vote power and have revoked your vote for 10 times your vote power will decrease significantly without any benefits for you.
Wow, did not know that. Thanks for sharing!
I've spotted it some hour ago when i was playing with the vote power and upvoted my own posts with different settings.
That's pretty good advice.