It's always a bit disheartening when I see someone from the engineering, product, or marketing sides of the business not understand the most basic of principles that salespeople learn at the beginning of their careers... people mostly make decisions based on needs, and if you don't ask and understand their needs you won't make the sale. Also, the more painful the problem that drives a need the more likely you will make the sale.

I had the benefit of learning this before I ever went to University by working sales jobs while in High School, and boy has it made my life easier not only as a programmer but also in nearly any collaboration with co-workers.

Don't recite features and benefits, that's just lazily hoping the person you're trying to convince will do your job for you. Take the time to ask enough questions to know and understand their needs. If the thing you're pitching can at least fit, and preferably help solve, some of those needs then you have a good chance of getting them to buy in. If, on the other hand, it doesn't address a need they have then you're going to struggle to convince them... and perhaps that may also be a clue that your solution may not actually be the best way to go.