I currently have 300+ followers and last week I made $40 for posting a single meme. I posted some other meme that got couple of upvotes but not as much as the magic meme I posted.

what is my strategy ?

Okay so gaining followers is key part of getting more upvotes and money on steemit as I am sure you all are aware of. I gain followers by going to the "introduceyourself" tag and comment, upvote and follow new members post and pages. They usually follow back cause they don't have a lot of followers so u stand out too them. This gives me 10 followers on average a day.

how to get the magic meme?

So I usually create my own memes by using meme generator app available on "play store" I think there are similar apps for ios.

I usually go to the "memechallenge" tag and get the picture running in competition and I post as much meme I can create of that picture I try posting around 10 meme a day!

when and where to post?

There is no specific time when u can post to get more like but I usually find Sundays gets most upvotes.

The tags I usually use are "meme", " funny", "lol" and wtf. Then the content of meme makes up 5th tag.

I hope this helps.