Yes!  Many.  First look at some of my tips & tricks page on my blog.

First tip (rule):

You have to remember you are the parent and can have a say in what goes on the plate or into the shopping cart.  Don’t buy marshmallows.  If he likes soft, squishy things how about mashed potatoes?  You can even mix in spinach or broccoli. 

He likes small things so cut the vegetables into small bite sized pieces for him.  

Keep introducing him to different textures and flavors with some of the same ingredients of foods he likes.  Add tomatoes, spinach and bacon to the grilled cheese.  Another idea cut out the fries and less nutrient-rich foods.  Try some sweet potato fries instead.  Try breaded fish or eggplant instead of just chicken.

Set the rules now it’s the perfect time!  Don’t give up! 

Also, I think it’s important to make it fun.  Pick his favorite character and say that character loves a certain vegetable you want to introduce.  Notice my “Magic Beans” or “Pink Pee” posts.

Good luck!