My first job was a waitress in a cafe. I had to be polite to the customers, even if they were rude or ill mannered. Now as a teachers I have to be polite even when I am angry at rude students.

my first job was all arou nd crew in some fast food before,i learn how to communicate with different kind of people foreigners and local how to meet there needs,as of today i am still using it in my job witch improve my communication skills. cowboy...

learnings for becoming a good salesman. I may not be a salesman today but I've adopted some good points from it especially the selling of my ideas to my boss as well as negotiation and persuading skill. :)