You can use Meta: to tag stories/scenarios. This is useful if you want to run just subset of stories/scenarios or skip some of them.
Example:
Meta: @sometag
Scenario: some scenario
Given something
Then you can use meta filtering and story mapping to include/exclude scenarios marked with certain tags.
You can change story file names so their lexicographical order will match order you want them to execute:
1_aaa.story
2_bbb.story
3_ccc.story
or create separate folders:
a/aaa.story
a/bbb.story
c/ccc.story
There is more nice solution in case when you need some story to execute before another one, GivenStories: clause:
GivenStories: aaa.story
Scenario: requires aaa to run
Given something
This will first execute aaa.story then this story. You can specify several stories in GivenStories
.