I think this can be done in conferences, as you expect to get feedback about your research from others.
Journal article need endpoints if your result provides a good and new information it can be published separately, but this will affect the level of your article, I think patience is required for research and publication.
Perhaps, not "methodology protocols" but rather ethical considerations.
If in you new paper you extract some data from a larger (or earlier) study -- and you have good reasons for doing this -- you would need to state this clearly in the article. To be more specific, you may want to:
1. briefly explain about the larger or earlier study
2. give a convincing rationale for extracting the data and writing this new paper.
I have read articles in prestigious journals where the researchers re-analyzed the data from their own earlier studies using newer and more robust statistical procedures, which resulted in new findings and important insights. In this case, re-using the data is well-justified.
If you have good reasons to use data from an earlier study (i.e., the reasons are scientific and not just to increase your publications :--) ) you would need to clearly state that the data is re-used and explain why this needs to be done.