One should make sure they submit articles at high-calibre free article sites where they are most likely to be found and used on other sites.
The larger repositories, however, do bring with them some risk of getting "lost in the shuffle." As such, it's a good idea to use some of the lower-volume submission sites, too.
Additionally, it's of great benefit to find submission locations that are truly consistent with your particular niche.
For those who don't have the patience or time to undertake the submission process themselves, the task can be outsourced. :wink: