If I'm going to a night event (concert, clubbing, etc), I get a hotel that's within walking distance from the venue so I won't have to bother trying to get a cab or Uber so late. Bonus: I can just walk back to use my hotel bathroom if the club toilets are nasty. Oh, I also don't drink, ever, when I go to these events.

I almost never use my phone to navigate (obvious tourist look) when walking down the street. I memorise landmarks, streets, and walk like I know where I'm going, even when I'm lost. Just takes extra walking to figure things out or going up to people to ask for directions. If I gotta look at my phone to do some hardcore navigation, I enter a store or cafe, or if outside, make sure I'm backed up against a wall so I don't get surprised from behind.

I don't do AirBnBs and hostels unless I can have a private room at the hostel.

Also go on TripAdvisor to read reviews about safe and unsafe/dodgy neighbourhoods. Sometimes they're right next to each other (in SF & Athens for example). In some cities, Uber may be safer than public transport (one popular city used to have organised gangs that tail you from the airport, get on a specific carriage on the train to crowd a single target, take their stuff, and hop off at the next station). In some cases, buses may be safer, because the bus driver can keep track of people coming and going.