Workflow
I organise my tasks with the help of the KANBAN workflow. This process helps one visualise progress and prioritise what gets done first. I use Trello privately and JIRA at the office. I've worked with Agile, KANBAN and SCRUM software development methodologies, and believe all have their merits and gotchas. I find that a looser "SCRUM - the best parts" approach is the one that worked out best so far, when predictability and estimates are key.
Open-source projects
I have a few open-source projects on GitHub. All of them are study projects, so take them with a grain of salt. Color Consolidator is an application that was created to help a group of UX and Front-enders consolidate and maintain color variables. Gitlog to JSON is a project created to scan relevant commit information from one or multiple repos and output it to JSON. Gitinsight was created to visualise gitlog data, and at its current state I would not even call it a draft, but it's a work in progress. All these projects have their flaws and are far from ready, but they're out there, waiting for your contribution!