BufferApp is a great scheduling tool. It makes sense to spend a bit of time finding content to share on social media, but there's no point sharing it all at once. That's where Buffer helps out.
Buffer will analyse your social media accounts to work out the best times to post - usually based on when your followers are active.
It then sets up a social media schedule based on these times (you can change it if you want to).
When you're reading an article you want to share, you click on the Buffer button on your browser, and it'll be added to your Buffer queue, ready to be posted according to the schedule.
It's a great tool with a free and paid version available. Check it out at bufferapp.com