Enriching BizTalk Message in an Orchestration

This is a simple post, but will help me remember what i did: (I apologize if this is high level)

There's at least 3 options:

1. If what i need to add is a dozen properties then distinguish them and add them in construct message expression (what i went with)

2. Use multi message map within the orchestration

3. Use BRE to modify the message (why the hell would you introduce a new moving big monster to your project?! bad idea IMHO, but if you have to)