Do you have a strategy for how certain campaign parameters should be used?
To differentiate between campaign traffic and organic traffic, and to sensibly assign campaigns, links must be given corresponding URL parameters. In the run-up to this, you should consider which parameters should be used and how to fill them. In this respect, etracker provides a central planning file (Marketing Reports > Sources > Campaign Help) which you can use to avoid different spellings and considerably simplify link generation for employees and agencies.
Were all networks & tools configured in such a way that campaign parameters can be affixed automatically?
Newsletter tools, adservers and ad networks (retargeting, affiliates, SEA, Social Media, etc.) can usually be configured in such a way that the suitable URL parameters are automatically affixed to the target URLs. With Google AdWords, this is even easier thanks to the direct connection to etracker.