>>14430307Engage in a series of competitive activities which give you a fake sense of confidence and raise your serum testosterone (or alternatively go to a sporting match and be a fan of the winning side to get a similar effect). This will amplify the effect of dopamine in your system but reduce the cortisol levels in your body. While Dopamine is associated with both rewarding and stressful activities, if you're asking 'neuroscientifically' which you shouldn't since you can't directly influence that - it should attenuate your neuroticism.
Also make sure your vagus nerve isn't constricted (how's your posture?). Have it stimulated, it can bring effects similar to MDMA.
Ensure that your gut flora is well balanced.