I have come across multinple approaches and systems to help you get through the work efficinetly and reach your goals.
And the main conclusion: any system is better when exececude well, than looking for a better system.
GTD, Kanban, Agile etc… Try any of those, but you need to pick one and implement it 100% to become efficint before trying something else
LeanKit tool website, looks promising
Lean blogs list