Micro is all about impacts on firms, consumers, workers and governments. If say it was an increase in min wage, talk about how it would effect consumers in terms of increasing incomes then link to higher demand and so more demand for labour to increase supply. Also, more workers means more tax income for government etc. Try to choose one point and stick with it - don't ramble on about multiple things, just choose one, give an example, analyse (make use of a graph if you can) and then evaluate!