Here's an outline for setting up a basic Traveller adventure. You can skip some sections if you want. Or you can add some. But this should give you a good outline to follow for creating your own Traveller adventures.
You can even use most of this for outlining pre-made adventures.
Give it a shot!
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PROLOGUE
The Introduction
ACT I
The Patron Assignment or Mission
Supplies and Sundry
The Departure
ACT II
The Mission
Getting There
What Happens?
What Happens Next?
What Else Happens?
ACT III
End of the Mission
Resolving the Mission
Final things that Happen
EPILOGUE
The Aftermath
Reporting the Mission
Burying the Dead
Selling Trophies
Getting Rewards