When you have any history essay, you have two ways to attack a question:
1. chronologically,
2. thematically.
The good thing about doing the essay chronologically is that the structure is more obvious (you just go forward in time!), and it's a bit easier.
However, the problem with doing it that way is that the essay usually ends up being descriptive rather than analytical.
'Well what do you mean?', you say? Your essay shouldn't be simply summarising the events and re-telling them. Rather, your essay should be analysing the event for things like importance, impact, contrast, etc.
Because of this, I say that essays should be answered thematically. In this case, read as much as you can on Cimon and his impact on the Greek world. While you're reading, note every important thing down. Once you're done your reading, sit down and split up all the ideas.
For example, in your readings, you might see that Cimon influenced the following things (all false!):
1. The building Dragostos,
2. a certain court speech,
3. Greek politics,
4. a funeral oration,
5. military style,
6. roads in Athens,
7. cult centre to Hera,
8. recreation of temple to Hermes.
Ok, so in those 8 things, you've actually only got 5 themes:
1. Buildings,
2. speeches,
3. politics,
4. military,
5. religion.
These themes should be re-ordered, I'd do it this way:
1. Religion,
2. buildings,
3. speeches,
4. politics,
5. military.
I'd order it that way because the flow is better:
Religion (religious buildings) -> buildings. Speeches -> politics -> military.
So yeah, do your essay thematically, as I have done. Try to make big groups of themes - you're definitely going to have to be very black&white (ie, do the temples come under buildings or religion?), but that's the way essays work! If you're very clever, religion and buildings will link together with the idea of religious buildings.
Yeah, hope that helps a bit!