Ah I haven't heard of steemworld.org, I'll look at it shortly. I can understand that, only upvoting yourself and not upvoting others can be discouraging for your followers and those who upvote your content. When I first started I tried to upvote everyone who commented on my contest / introduction posts. Though I shortly found out that you actually have a voting power meter that's refilled over time so your votes are worth more.

Since then I've been trying to vote less so I can give more to those who engage in my content.