I honestly could have sworn up and down the church aisle that I’d posted something in these a few months ago. Obviously, wires got crossed either in the real world or the nether of my mind. But long story short, here are a couple great resources to use when building reports using Reporting Services.
The first is basically a best practices document that is wholly worth the read. And the second lists some of the more common limitations that are out there as suggestions to future reporting services versions.