Individual task management is about capturing without losing flow. Inbox: dump tasks when they come up. Weekly review: process inbox, plan the week. Daily: pick priorities, protect focus time.
Methods work: TODOist for simple lists, GitHub Issues for project tasks, PARA method for organizing across projects. The system must be simpler than your work requires, or you'll ignore it.
Avoid: task paralysis (lots of tasks, no progress), context switching (too many in-progress), shiny tools (switching systems wastes time). Pick something, use it consistently.