Trello + Pomello is a quite powerful combo. Not only I use it for focusing, but also tracking time that I spend on freelancing (down to specific Trello tickets).<p>Pomello: <a href="https:&#x2F;&#x2F;chrome.google.com&#x2F;webstore&#x2F;detail&#x2F;pomello&#x2F;ahjnfakocpfoocnncbgmondnnnlfjide?hl=en" rel="nofollow">https:&#x2F;&#x2F;chrome.google.com&#x2F;webstore&#x2F;detail&#x2F;pomello&#x2F;ahjnfakocp...</a>