A very useful article about organizing all the information about the research you have done before sending a query about your manuscript and all the information about who you have sent queries to.
https://writersinthestorm.wordpress.com/2011/03/07/great-agent-search-part-3/
The idea about having a 'Do not submit' file that contains the reason why certain agents/publishers are on that list is brilliant, as is the screenshot of a sample Excel spreadsheet. The advice about not deleting your query campaign files and rechecking each item before querying a different manuscript is also well worth keeping.
Something for our illustrators:
Having a range of promotional postcards to go with your illustration portfolio is highly recommended. But what should they look like? What works and what doesn't? To see what other illustrators have done, visit
https://subitclub.wordpress.com/postcard-post-archive/ But view the link on a computer and not on a device, because it is so image intensive it will take a long time to load on a device.