How to surf the internet on another person's devices at no risk

Surfing the internet has become part and parcel of our lives such as sending instant messages, performing online transaction, e.t.c
We might find ourselves in a situation where we are out of data subscription, using someone else's phone might be the only option. Therefore, precautions should be taken why using someone else's phone be it your friend or relative.
The precautions include:

1. Open an incognito tab on the web browser to surf.
2.Do not save passwords while logging in any accounts such as social media,bank accounts among others.
3. Always log out every account you opened.
4.Clear your browsing history when you forget open incognito tab.
5. Close all opened tab after you are done.
6.Be cautious of public WiFi hotspot you.
6. Take all other necessary security measure that you think is required not to fall victim of privacy intrusion, bank fraud, Stolen identity and other social vices that might be associated to being careless on the internet