TLDR: Your starting point is exercise, sleep and sunlight. Nothing after that really has as large of an effect.
Most people would disagree - at least, anyone who drinks caffeine would.
I love caffeine and coffee, but if we are talking about well-feeling, 5 minute calistenics would make you feel better in 99% compared to a cup of sugar laden cappuccino
Trying to be more practical and a touch less sarcastic for a minute… I find, on average, I tend to get about two hours more work done on days where I spend at least 45 min in the gym and that includes the hour or more loss from the activity itself. Skipping caffeine on the other hand, doesn’t have any effect unless I’ve missed sleep the night before.
If you are thinking of dipping your toes into supplements though and don’t really want to exercise or sleep, I’ve found Creatine to be really helpful in that state. Definitely a stronger effect than caffeine but takes a lot longer to kick in!