OmSave is a small, yet useful Safari extension for OmniFocus which adds a simple toolbar button allowing you to quickly save relevant page information into your OmniFocus 3, where you can review it later.
OmSave will try to fetch the page metadata, like page description and main image, and store it in the note attached to the OmniFocus entry, alongside the link. If a page didn't have any images, OmSave will store a screenshot of that page instead, for your reference.