Systematic Investment Plan - SIP
  
A system. A pattern. An algorithm. And it can be something super-simple, like $200 a month. That's the systematic investment plan: you take $200, every month, no matter what, come Hell or chai water, and you buy $200 of ticker: SPY, the index symbol of a popular index representing the S&P 500. That's $2,400 a year invested, every month, for 25 years, no matter what. That's your retirement plan.
Do it right, and you retire in fine style with no worries. Welcome to America.