When you are struggling to get something started because you are unsure it could be worthwhile to try doing twice of it. The idea is not to overwork but to overcome any inhibitions.
The irony of motivations is that you often need to get moving to get started. Yet the first impetus is hard to come by because we like to wait for something else to happen before taking action.
Doing things once propels you forward. Doing things twice hopefully doubles that.