Just carry one around with you and whenever something important happens or you are about to do something risky, pull it out, press it with your finger and loudly say “Save”.
Edit: Bonus points for carrying a huge cardboard mouse pointer to click with.
Edit 2: I really should read all the replies before starting to type.
“I haven’t eaten in 4 hours and 41 minutes and now long for a sandwich with cheese, tomatoes and lettuce” also gets more info across than saying “I’m hungry”, yet people keep using the latter.