We all have a very important decision to make today. Our sales have dropped dramatically ever since we decided to maintain the strategies we had been using before we decided to expand the services of the company. Nonetheless, we must find alternatives to recover from our big losses immediately.

Nonetheless can be used to show result or consequence.

However he tried, it was very difficult for him to speak in public. He has been through hard times trying to do it since he was a kid at school, and that is why he decided to look for professional help. He cannot lose any more opportunities because of his inability to communicate.

However can be used meaning ‘no matter how’

The crime shocked the whole community. People still cannot understand how a human being can do something so terrible against another person. The judge listened to the lawyers and the witnesses all day long. She was able to make her decision thereupon.

Thereupon indicates constrast.

When I first came to this city, I was amazed by how organized it can be, and I decided that I wanted to live here at that moment. Hence, I have changed my mind. I believe I had a very wrong impression because I felt I needed to leave my hometown at that moment.

Hence is used to add ideas.

Patricia is always very prepared for her classes. She brings extremely interesting topics for us to discuss at the beginning. Nonetheless, she usually concludes with a written production, which makes the learning process very meaningful.

Nonetheless is used to indicate that one event occurs after the other.