Make 3 columns on one. in the first one write 10 worst case scenario of the action/decision you gonna take. In the second, write how you can prevent them. In the 3rd one, write what will you do if they happen somehow. (how will you repair)
In the second page- mention benefits of atleast taking the action. What would you learn new if you take that decision (even if it fails)?
In the third page- write the cons if you don't take the action. What would you lose if you don't take the decision? What will be the effects for i) 3 monts, ii) 6 months, iii) 1 year.