Depending on the water level and clarity be ready to switch up tippet. Brings lots of eggs in a variety of colors, shapes, etc. Bring some tiny trout nymphs for those clear water days. Purples, whites, reds, orange, all good colors to try when it comes to wet flies.
I always fish to a particular fish, then move on to the next, so on and so on. For me steelhead fishing is all about angles, trying to place that fly right on their mouth forcing the issue.
If you foul hook, simply hold the rod straight out and pull. We use little connectors so the line in those cases, or if you somehow grab a snag (that's where the fish tend to be) or a tree, the tippet breaks at that point and you don't wreck leader.
Most of all simply have fun.