Where did Dante write, "The secret to getting things done is to act"?

In the toilet. He'd been feasting heavily on boiled eggs and unripe bananas all day and he was very definitely all "clogged up" but, no matter how hard he tried - and he tried! - there was no way he was going to "unlock that passage" and "ease the journey", so to speak. But, with a firm resolve he acted and, shortly, the offending badboy was released into the pearly waters of the Mediterranean where, apparently, it became a danger to shipping. Hope this helped.

Dante did most of his writing in Florence, Italy.

While the quote is attributed to Dante, there's no record of when or where he first used it. 

I'm going to say in the drawing room with a candlestick 

Sexy screen name, btw 

Google can answer that for youy, lazybones. I know because I just checked and found the answer in mere seconds.