Trello board with three lists Done/Doing/ToDo

Make a list of all the stuff you need to do.

Prioritize it.

Move the top item to the doing list and start working on it.

When you’re done move it to done. Take the next item off the to do list and repeat.

I use other lists on trello to maintain cards for my research or to move features off the to do list that aren’t necessary for v1.