I came across a game mechanic that, well, I'll just paste it here:
Anyone have a macro for this?roll a number of d6 equal to the trait that applies to the attempted action. Every even number rolled counts as a success. If you roll a 6, you earn a success and you also get to roll that die again. Another even number earns you another success and, if you roll another 6, another roll. This continues as long as you keep rolling 6s.