Good one! I see that you don't have enough points to meme comment... Let me help you! I will upvote all your memes and comments, and give you valuable advice!
1. Comment on front page memes. People upvote those too!
2. Make more memes. You will only get 2 submissions a day, but if you make memes regularly, you should go up to 3.
3. Make friends! A good Imgflip friend is Spurs_Fan_From_Around. He/She also gives valuable advice. Just compliment his/her memes, and ask! Another good Imgflipper is Socrates. These guys will usually find you when your meme is on the 'Latest' front page.
Good luck!