The best way to enjoy Manhattan is from Brooklyn. Transmitter Park offers views without the crowds, and you can pick up coffee-to-go and treats from nearby Ovenly. The India St/Greenpoint Ferry is a 5 minute walk and will take you all the way to the Rockaways in the Summertime.
This is the new bike share program of NYC. It's amazing. I went for the 1 year membership for $95. You can also get day passed for around $10. There are stations all over the city. You can now have a wonderful day changing between walking, biking and the subway. Finally, I can stay away from the crazy cab drivers...
The operators of the Peter Pan bakery make the best donuts I've ever tasted. This place is charming to its core. Decor and presentation: circa 1971 & virtually unchanged since.