Make the opening line earn the tap
Only the first couple of lines show before a reader has to tap "see more," so whatever earns that tap needs to be there: a specific claim, a real question, the start of a story. A warm-up sentence that could be cut without losing anything is in the wrong place.
Write toward a specific lesson, not a general observation
A post built around one real experience, a decision or a mistake or a result, holds attention longer than a general observation available from any business account. Specificity is what gives a reader a reason to keep reading past the first line.
End with something that invites a real comment
A direct question related to the post's actual content earns more substantive replies than a generic "thoughts?" tacked on at the end. Comment quality, not just volume, factors into how a post performs, so a question that invites a real answer is worth more than one that invites a reflexive one.