Card repeater power-up
http://blog.trello.com/trello-card-repeater/
https://recurring-cards.trello.services/images/CardRepeaterScreenshot.jpg

Toggl integration
https://chrome.google.com/webstore/detail/toggl-button-productivity/oejgccbfbmkkpaidnkphaiaecficdnfn?utm_source=chrome-app-launcher-info-dialog

Copy-paste images
Have an image copied in your clipboard? Just paste it in the card description. No need to upload the image as an attachment.