I did read in more than one place that you should always upvote your own stuff (posts or comments). I also read that the system is designed to be optimized around 20 upvotes per day per person. I guess after that the value of your vote gets diluted.
As far as how I behave? Well, hard to say as I'm just as new as you are :)
Thank you for your information, I saw that upvoting your own post doesn't give you dollars, but maybe can be useful to make the post more visible.
Didn't know about the 20 upvotes optimization but it may be the right number.
About how to behave, I will try to understand better this social media website and I'll let you know ;)