Hey, I had to cure my introversion too. I did it by looking at the biological differences between introverts and extroverts and mimicking an extroverts biology. I actually created a product for it but it tanked lol.
Studies have associated introversion with poorer working memory (2) and higher cortisol (1). There are many other better studies but I don't have the time to dig further.
Anyways the most cost effective way to mimic the biology of an extrovert and become one in my opinion is to play dual n-back for 25 minutes every day for a month and take tilia tomentosa daily. N-back for the working memory an tilia for the cortisol.
There are so many alternative regimens that will create the same result I'll just name a few things to look at if the above doesn't work and you are willing to spend money. Stablon for working memory (3), Rhodiola Rosea for cortisol, Combination of ginkgo and ginseng for working memory (4), and good quality fish oil for working memory (5), Exercise and sleep for cortisol.
1)
http://www.ncbi.nlm....pubmed/18809259
"Neuroticism and introversion were significantly and differentially associated with features of diurnal cortisol patterns"
2)
http://www.scn.ucla....n-Executive.pdf
"The results of the current study suggest that extraverts have better working memory skills than introverts."
3)
http://www.ncbi.nlm..../pubmed/2680463
"In mice, tianeptine does not impair spatial memory but have facilitating effects on both working and reference memory."
4)
http://www.ncbi.nlm....pubmed/11140327
"This effect represented an average improvement of 7.5% and reflected improvements to a number of different aspects of memory, including working and long-term memory."
5)
http://www.plosone.o...al.pone.0046832
This suggests that dietary supplementation with fish oil might increase VMAT2 availability, enhance dopamine storage and release, and improve dopamine-dependent cognitive functions such as working memory.