One option would be to create a folder within your subscriptions that you can title "Useful Tips" or something like that. Unfortunately, I think you can only add full threads to there and not individual posts. I use the folders for trip planning where I'll add all the useful threads I find about the hotels I'm planning to stay out, airports I'm transiting, activities in the city I'm visiting, etc in a folder such as "Australia Trip 2016." You could also save a file on your computer or Google Drive with links to especially helpful posts. The problem I find with all these is remembering to look it up.