For small/solo projects I prefer to use a notebook with the first few pages reserved for an index. I complement it with a kanban board on the wall (post-it notes).
What I like about it:
No procrastination in a management tool (over-planning, formatting, etc).
No illusion of order (technology/computers have a tendency to make you appear disciplined, or to pretend you will be more disciplined by using them… I think it's bullshit. Discipline is a core skill, not the ability to use a tool).
No software can provide the feel of moving a post-it note to the "Done" column. Physical data (pages) is also supposed to help memorization.