Memer's block... I've been there, it still happens to me sometimes. Here are some ideas if you want some advice.
Sometimes when I can't come up with ideas, I look through my older unsubmitted creations (usually meme comments but sometimes gifs, pie charts and demotivationals) If you find something there you think would work, you can add a title and relevant tags and submit. Some long time users say they will recreate those old comments if they intend to submit. Other sources of inspiration for me have been to look in farmerann's template memestream here imgflip.com/m/templates or in DashHopes' memestream here imgflip.com/m/needameme Hope that helps!