When this might have been a problem in the past, I basically always reminded myself that there was nothing i could not do. Whatever problem or obstacle I faced,

When this might have been a problem in the past, I basically always reminded myself that there was nothing i could not do. Whatever problem or obstacle I faced, I always overcame it. And that always gave me confidence. Plus, allow yourself to say "i don't know". It's actually a good sign of a sr programmer if he has the balls to say this to a boss, customer, other devs,... because a jr would feel dumb but a sr feels confident in that he does not know but also that he can learn.