The best way is posting your own content and the most important - using tags. Posting can earn 75% cost of your articles. When you upvoting or resteeming your earn Value / Number of (upvoted or resteemed people) * 0.25.
So: money = V / N * 0.25.
It is very small. You can earn a lot with upvoting and resteeming when you would have a lot of SP.
The best way - it is understanding what people want (what type of news, knowledge) and write or post images of some excited places, nature, food, events.