I'm really dumb if I don't have enough time/energy/motivation to work through several iterations of whatever idea/task I'm doing. Basically, my first draft is often incredibly dumb, my instinct/intuition/autopilot seems to be extremely unreliable. So I can't do anything on impulse or say whatever comes to mind without risk (I had a phase lasting a few years or so a while back where I lived impulsively/recklessly and it was a total disaster). A decade of depression and such I think has damaged my intellect, as well. Also on the input side, I tend to just believe whatever people say (working on it), no matter how insane/stupid, as a default (again, requiring I use a lot of energy and focus to use critical thinking, since there's no good autoimmune response).
So some strategies for me is to take care of myself to have some energy, and to use it wisely. To decide if someone is worth listening to ahead of time (especially online). And to try to give myself time to think things through. Also talking to others/getting info online, if at all possible, could be a good asset to balance out my natural stupidity. Another thing is caring, because of the depression/apathy I'm less likely to care about making mistakes (feeling like everything's already over), which only makes this worse/doesn't motivate me to think hard. So that has to be challenged and maybe replaced with a goal/ideal of being someone who uses his head.
Hope something there helps, best wishes.