I am travelling often across Germany. I would love to use this time to work, especially because there is internet connection on board of the ICE trains. However, I often feel disturbed and cannot concentrate. I can point to 2 possible reason:

1. People are talking around, even if it is a quiet car;
2. I cannot focus because of the neighbors looking on my screen.

I have tried several strategies: i) select the least attractive seat; ii) use earphones and listen music; iii) make remarks to people when they are too loud. None of these really helps. I would like to ask if you have some tricks how to deal with such situations.

P.S.
1st class is not an option for me.