Step 1: Subscribe to good newsletters.
Step 2: Sit down to read them.
Step 3: Jot down every idea you read in them that you find valuable, surprises you, or you strongly agree or disagree with.
Step 4: Open your social account.
Write about one of those ideas and your take on it.
Press publish (or schedule it to publish later).
Step 5: Repeat.
Congrats!
You now have a social content strategy you can use forever.
(And you’ll have WAY more ideas to write about than you have time to write them.)