If you are staying in Old Skala, you can get a boat trip to Ithaca from Skala beach; you book at a little open air desk next to the Anassa hotel on the sea front. You pay on the day of the trip in cash only, then queue on the beach to get on the boat. Take swimwear as they have a couple of swim stops. They also do trips to Fiskardo and Zante.
Golden eagles in the mountains, you may be lucky enough to see them.
When you get there, try to get hold of a Skala 3D tourist map, it will show you where all the hotels/bars/tavernas etc are. There are the remains of a roman villa near the beach, some nicely restored mosaics. As far as I know there is no charge for seeing them. Pop in to Veronica's jewellers, lovely things and reasonably priced, on the main street. You will probably need neoprene swimming shoes as well for the beach as it is a mixture of coarse sand and gravel/stones.
I was there last year and the temp was in the high 30's. On the plus side the sea was warm which it isn't at the start of the season. There were a couple of turtle nests next to each other down at one end of Skala beach, roped off. I often wonder how many little ones hatched and are still living.
One of the best innovations was at the airport going back. After you check in and drop your luggage off, you have the option to go back outside and down the road to a taverna, rather than boil inside the terminal building! You do need to keep an eye on the time though, but you can get food and a cold drink before you fly. Tiny airports don't do very well on the catering side I've found.