Summary of this afternoon

I ate a lot this afternoon but overall, my appetite wasn't as good today as I would have liked it to be.  I guess because I wasn't so hungry since I consumed so much food today.  I hope to also look back at my diary and see what is really wrong with my diet.  I feel great because of exercise but because of issues with my diet, I know I am not eating healthy.  It is usually a case of instead of this, then I should have eaten that.  How do I continue to create meal plans that I would like to follow?