Firstly, you as an individual can educate yourself about the rule of law and what your government has pledged to do to fight corruption. You will then be part of an informed citizenry, and therefore lead to a healthy democracy, that will hold elected officials responsible for their actions. Furthermore, you can support your education, and fight for the children, make sure they are taught how bad corruption is.
Secondly, you can safeguard development. How? simply by telling elected officials that fighting corruption should be an integral part of all development policies. You must remind that the people in office represent you, your ideas, both at home and abroad.
Whenever you spot corruption you may just go to the authorities that fight corruption.
Hope this helps!