Iranians are not organized (the people), you cannot expect to achieve anything until you get organized. Start building groups, decentralized cells that operate on their own without a centralized leadership. Read and learn! Most of the Iranian supporters of Mousavi are intelligent, that is your weapon.
Learn about tactics, sabotage, etc., and gather supplies you will need. You cannot gather in groups and attack the police using the police's own tactics of large-scale street battles. You need insurgency, and sabotage.
You are intelligent Iranians, you can get into employment and infiltrate agencies that no other Iranian can. The only way a government can be brought down is with an insurgency from within. Look at the Soviet collapse for an idea of how this is done.
Most importantly, build international support, you cannot do this on your own. There are many organizations that would support a move towards democracy with supplies and money.
Without the above, you cannot achieve anything except suffering for those who would most likely be wanting to help the cause.
