How do you address the conversion overlap between your channels in e-commerce campaigns?

This is what I do:

1) Always use UTM's for campaigns

2)Assisted conversion reports in GA

3) Multichannel Funnel reports in GA

4) Focus separately on Branding keywords search and paid traffic.

5) Understand the pros and cons of the last click attribution.

6) I use a linear attribution model.

7) Direct is not a traffic source.