A bit of lore in employment talks about being good to people on the way up because you will see them again. That is true. The smaller the career field, the more often you will see them. It is especially true in finding who is looking to hire when you or your former cohorts are looking for a new position.
Having someone in another company who knows your worth and abilities can be a large part of gaining new employment. Keeping in touch with people you know and have worked with is always good. Sometimes they will be looking for something new, and sometimes it might be you.
It never hurts to do good for others, especially when you may need something good in return one day.
Keep a page of those you know and where you worked together. Trying to remember at a time of need is not the most reliable way to contact them.
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