Quick Tips/Suggestions:
If you’re going to enjoy yourself in Athens, you better get in shape and bring comfortable walking shoes and plenty of water. Most of the famous sites in the city require either walking uphill, or walking along a stony path. And beware of the marble stairs, wherever you go: they are dreadfully slippery!
I took a city bus tour on my first day in Athens and it was worth the money. The tour included the Acropolis, and took in the region of to the Olympic Stadium, Syntagma Square, Zeus’ Temple and other important tourist sites. It was a nice way to make introduction to the city and plan out the rest of my trip.
How about the food? Modest neighborhood restaurants are your best bet. They dish up inexpensive, delicious and truly local fare. Fancier restaurants in spots like Plaka are expensive, and you’re more likely to see fried chicken on the menu, than a gyro or souvlaki. And a word of warning: go easy on the OUZO! That stuff goes down way too easy, and after finishing half a bottle with dinner, I slept for 12 hours and had a hangover the next day.
Where to stay? Hotels and hostels are plentiful in Athens....