Smells don’t bother me and well, when my SO fries some eggs with sausages - dry, tasty, with lots of paprika -, that smell is impossible to avoid in the house 
If I am hungry, I immediately stop fasting and if I am not, well okay, sometimes I get tempted but not when I am a determined faster. It took many years but now I really can wait a little… 
But I am still sensitive to my SO coming home to have lunch. I often eat even if I wouldn’t alone. It doesn’t help that I cook before and I almost always can eat around that time… I need complete satiation to be completely safe and that’s tricky at 3pm.
But I go back to my strictest woe again and I will focus on my timing too! I start tomorrow.
Sweeteners… I don’t reallty care about their price as I use so very little. Perk of carnivore(-ish), no sweeteners are allowed
I relax my ways, being me, when I lack meat so must eat pancakes or just wanna eat them without a good reason… But I rapidly lose interest even then. Especially erythritol feels worse than before now and I never liked the taste (it’s like sugar, it doesn’t have any taste to me. just neutral sweetness). But now it feels off somehow, not bad taste but like oversalting something, some negative burning feeling?
So I use xylitol, often mixed with erythritol. Xylitol is tasty, only coconut sugar and honey is better. And fruits but that’s different…
It seems I can handle sweeteners just fine - but they aren’t normal food and they mess up something mentally, just like carbs. They make me want sweets and it hardly stops without a huge amount. I just want more. And more. And more. It doesn’t sound healthy. I almost always eat substantial, nutritious, very fatty sweets (the kind I prefer anyway), it limits the amount but it’s better to keep such days very rare.
I don’t put sweeteners into my drinks, be it tea, coffee or cocoa. I don’t really care about chocolate anymore but I don’t need sweetener in that either. And I got bored of cakes on my original keto. It’s mostly for my sweet pancakes, whipped cream and the like…
I never have sweeteners when fasting, it’s bad enough I use a tiny cream… I should do something with my coffee addiction. It’s way better nowadays but still too much. It’s the only “bad” addiction carnivore couldn’t stop immediately. Or ever.
So, coming tomorrow, I do it right! It’s the plan, at least. I want a very small eating window as it feels ideal for me and I want proper fast. Maybe tea but no coffee.