Keep an idea log and assess it weekly. I have a trello Ideas board with the columns: - Concepts (stream of conciousness) - Promising (have given it some though

Keep an idea log and assess it weekly. I have a trello Ideas board with the columns: - Concepts (stream of conciousness) - Promising (have given it some thought, and could be interesting) - Validated (have validated it in some way) - Building - Shut down