IMHO, the most effective life coach is one who gives the example, just that, and shut his/her mouth on 'teaching' and they don't say people what to do, how to do,... all that is likely cloaked ego in super duper denial.
If I have to hear what I need to hear, I hear it unexpectedly while waiting on the bus or in the lines of a song, pin point exact what I need and for free. The timing chooses itself for some reason. When I'm ready I hear or understand the underlying power, funny enough the speaker was probably meaning something else
There is a market and need for everything, even the most stupid horrible things sell, so when you want to become a life coach you have won already whatever you're planning to say