What not to do

Obviously everyone knows this but just to remind people how to lead their lives....
No action must be done that harms another person.No action must be done that harms you.Yet some actions looking a bit sacrificial might save the day.Have you heard of people  swimming into a raging stream to save some one?
However before you start to swim, you need to disrobe yourself or you might need to be rescued too.
Another example is to take an active mobile phone whereever you are....how would you let people know where you are.
Another example is to learn a Good universal language for the region where you are, will be or travel into.Only then can you explore things better.
Always have  enough loose change.( in money terms I mean)
And what not to do...do not trap yourself with a high cost education that puts you and your dear ones in debt.
Do not waste  anything.