Want to know a great way to handle a subset of these? Good automated code linters. Google has a ton of formatters and linters that either auto correct or suggest changes. To paraphrase a smarter Googler than me: People tend to just do what the bots say and don't care too much about. The best way to impose your code ideas on others is via a linter.

Automated tools here have also drastically reduced the number of comments I get on CLs at Google, as people don't bicker about the little things as much anymore.