How can you make your mercury strong? Its strong already!
Your Mercury is in the term of mercury and the face of mercury. That means its in very good essential dignity. Moreover your Mercury is in the 1st house and conjunct your ascendant.
Furthermore in your sidereal chart (vedic) you have a gemini mercury. So in either zodiac your Mercury is essentially strong.
Now that that is out of the way... Your mercury while strong, is also afflicted.
Conjunct mars imo is the biggest issue here. Mars is naturally a malefic for most and since hes not very dignified in your chart i assume thats the case for you. Mars likely speeds up your thinking to the point that you let important facts and statistics slip through the cracks. Slow down your thoughts a bit and make sure you pay more attention to the details.
Neptune opposition your mercury and ascendant is the next big issue. You may want to start meditating. This opposition indicates that you live in a bit of a fantasy land and drift off to there at times when you should be concentrating on other matters. Learning to quiet your mind through meditation is the only answer for this really. I would also reccomend: A New Earth by Eckhart Tolle. I guarantee that this book will change your life.
Last Saturn is quincunx your mercury. This ones debatable as some would argue that Saturn not aspecting mercury (a quincunx is not an aspect as the signs dont see each other, though the quincunx still definitely has a meaning of its own) is actually good for mercury. Even still this probably means that you need to get a bit more organized in your life in general. I would think things through a bit more before you speak or take action with this mercury saturn quincunx.
you have to read more and learn for basis.
http://www.indianastrologyhoroscope.com/Planets_Zodiacs.htmlMars is a fiery planets having good importance in Vedic astrology. Mars represents aggression, wars, authority, determination, leadership and vitality. Mars is considered malefic in Vedic astrology. To some natives, it causes hurdles, breaks and delays in the important aspects of life. But to some other native like the natives of Aries, Scorpio, cancer and Leo ascendants, it become yoga karaka planet. In this state, it causes much wealth, authority and prosperity to these natives. Mars also causes manglik dosha which is responsible for creating hurdles, breaks and disputes in the martial life of the person.
Oups... sorry, you're totally wrong, particularly in this case.