Use the 20% per day but keep it there so that the vote has value.
Spread it around and make others cheerful. I find that "adopting" one or two to help them along really goes a long way.
Getting newer people to hit milestones is important. Getting the first 25 SP, then 50, then 100, then 500, then 1K.
People who stick with it will see their accounts grow...and the value of them will grow exponentially through out 2018.
I'm finding it hard to keep my voting power, it's been an issue deciding how to use it since I started having enough for it to be meaningful. I've kind of decided to just vote for everything now! I literally upvote all comments and posts, mine and others, and basically all of my feed. It does drain my voting power, but I just see it as spreading it around.
Whatever we do with our vote everybody wins, the important thing is that we vote. I would like to keep it higher, but maybe I'll just start giving away Steem or SBD directly after a certain point if I really want to help out someone I like. I'm pretty happy as long as I stay a dolphin comfortably, I'm not looking to get any more now.
LOL you keep upvoting all your comments, you will grow bigger.
Personally, I try to keep my VP up, which means sometimes I have to walk away from here. I found that not upvoting my comment (I do upvote my posts) really helps to keep the VP strong. I also adjust it...everyone who comments in one of my posts gets upvote (unless it is something really foolish). However, I try to keep the percentage down to be able to pass it around.
I do upvote posts at a higher percentage since more effort usually went into them.
But as you said, as long as people are voting, especially those without a lot of rep nor SP in their account, that is what is important.