During the initially out-breath, count 'one', 2nd out-breath 'two', third out-breath 'three'.
Check out firms that provide testers of the different flavors - you could want to choose up certain of these, too.
Statistics On Teenage Smoking Inside The You
My colleague the National Examiner has a good round up of those results: or at least, the results because announced.
This is important info as it assists us understand what challenges lay before us.