Since I have been posting here I do not up vote my own posts. I have done so a couple of times on accident when I thought I was upvoting a comment from someone. I think that has happened twice. That is one of the ways.
There is another time I will intentionally do it.
If I am down voted and my post is not plagiarism, spam, or abusive then I'll up vote my own post to counter that.
If someone downvotes my post and provides a reply stating why and it makes sense to me then I will not upvote my own posts.
That's it.
If it is not one of those circumstances I will not up vote my own posts and will save my voting power (limited but always growing) for other people's posts as well as comments. I tend to up vote quite a number of comments as I like to encourage engagement at that level.
I decided I wanted to put this out there because I appear to have attracted what seems to be a new bot that is auto downvoting my content. It is not huge but if someone down votes my post I'll upvote my own post 100%. I am not going to take the time to try to determine how to equalize it. If my vote is worth more than your downvote then I'll end up getting more because my vote will be larger.
Best way to handle my posts if you don't like them. Ignore them.