Whether you have $20 or $200,000 to invest, the objective is the 
same: to make your money grow. The means, however, vary dramatically 
based on the amount of money being invested, the state of the market, 
and your own investing style. 
 
Steps
Pay off high interest debt. If you have a loan or credit card debt
 with a high interest rate (over 10%) there's no point in investing your
 hard-earned cash. Whatever interest you earn through investing (usually
 less than 10%) won't make much of a difference because you'll be 
spending a greater amount paying interest on your debt.
 For example, let's say Sam has saved $4,000 for investing, but he also 
has $4,000 in credit card debt at a 14% interest rate. He could invest 
the $4,000 and if he gets a 12% ROI (return on investment--and this is 
being very optimistic) in a year he'll have made $480 in 
interest. But the credit card company will have charged him $560 in 
interest. He's $80 in the hole, and he still has that $4,000 
principal to pay off. Why bother? Pay off the high interest debt first 
so that you can actually keep any money you make by investing. 
Otherwise, the only investors making money are the ones who loaned it to
 you at a high interest rate.