Is There a 60% Rule to Progressing?

I think in order to progress you need to regress and I use the 60% rule. we should always be progressing and trying to achieve kind of a new benchmark so with our bodies with you know anything you think so well here's the thing for me. If I'm 60% ready I move on  and once I get to a point where okay I'm not reaching that 60% I hang there as long as I can until I feel like okay I need to back off but what I always do is next time when I come back to pursue that task I always start from step one again.