how are you changing your diet for early pregnancy?

Sarah
How are you changing your diet for early pregnancy? 
I recently found out I am pregnant and am wondering what general diet advice you ladies have. I was previously on a ketogenic diet for about a year but I feel selfish depriving myself of necceary food groups during pregnancy. I am used to eating once daily at dinner time because ketosis greatly reduces appetite. Any general advice is greatly appreciated! If you also have good ideas for portable nutritious work snacks I would love to hear!