Weight / Fat loss

Some vegetables are high in carbs but you should be ok with most, googling low carb vegetables should give you a list but basically steer clear of potatoes or use sweet potato instead.

I didn't really fast at all to achieve ketosis, but also found it easy to get back if I fell out of it. As disgusting as it sounds I could pretty much tell how good I was doing by how bad my breath was.

my advise would be to avoid all carbs, even trying your hardest to avoid all carbs you will still probably be around 20g, they're in everything.

An average day for me would have been;

Breakfast;
coffee with coconut oil and butter/full fat milk/cream

lunch;
chicken salad
full fat Greek yoghurt with blueberries

Dinner;
Lamb, steak or fish with huge stack of veg (asparagus, green beans, aubergine etc)

For me the hardest thing was not eating bread.

They are as Dry says but also high in nutrition but low calorific value. Stick to salad, veg grown above ground (brocolli, cabbage etc) and reduce root veg as the carb content in that is higher. This book is one of the best I've read.