That's pretty interesting, thank you. To me Adderall is a bridge too far though. I don't want to truly medicate (though I guess we can always argue semantics i.e. is getting coffee everyday not like medication?).

I just need something like the Americano every now and then really.

I agree on vigorous exercise completely. My last two jobs have been (well, the current one still is) hugely demanding and that led to me dropping a lot of exercise. Still trying to understand why and to undo that because I gained back 5kg (sigh).

Tried Earl Grey too. It's actually awesome but I must be careful; easy to go above a certain dose that just tires me and makes me crash.

One thing I'll try before considering the coffee machine really seriously: theacrine pills. I'll give them 2-3 weeks and will make a decision.