I often find it confusing using something at the end of the sentence or title that describes a list or content below it.
The sentence example:
Here is the list of services we provide (':', '--' or '-'?)
[The list of services here]
The title example:
Enterprise mobility (':', '--' or '-'?)
[The enterprise mobility content here]
Note: While describing the 'sentence example' and 'title example', I used colons above.