Action is that determination to pull off something and its often difficult because it requires gut when fear of repercussion keeps niggling.
A whole lot of self control and self realization is necessary to get anything really productive done. Since I don't have much self control or self realization yet I am into trial and error... mostly failure, but I wouldn't have known as much as I do now if I had not taken that initial fall again and again.
Trial an error is another form of risk taking I guess, the fact that we're endeavouring and making impact is all that really matters by all means, at the end of the day it even takes gut to make a move and that is a definitive point.