I find eggs for breakfast are what saves me Huff .(although I didn't today) I can usually last out until about 10.30am without food , but i take two L eggs and a slice of Brunswick ham into work and make scrambled in the microwave , (or omelette at home) . its about 250cals with a scrape of butter to cook .
It lasts me until dinner.. Also drink lots of water . I mean lots , . 2l at least .. I also have black coffee and herb tea .
You do get used to it after a few days.. and water helps with the feeling weak.. a lot of hunger is actually thirst they reckon, but if you are eating a lot less ( because food contains moisture) you do need to drink more