Over time I have collected some tips about fishing small streams - creeks - like my local Piru Creek were I try to practice all of these suggestions.

• When possible, cast against rocks and allow the fly to slide to the water.
• Fishing a dry fly, the most important technique is to pause after the take - giving the fish time to turn begin to swim back downwards - then lift the rod straight up to set the hook.  Too fast of a hook set will miss more fish then too slow.
• In the winter months, especially on small fisheries, it's almost always more productive to use smaller nymphs (#16 - #20).  Drop down a size on the tippet too.
• When fishing around trees and bushes on small water, allow your line to drift down stream, then start your cast.  This method of loading the rod via water current aleviates the need for a backcast.
• Stealth is a must.  Generally speaking, so is casting upstream.  Trout position themselves facing upstream, so casting from behind them is good-sneaky.
• Even in heavy churn trout can be present.  Water is calmer at depth.  What might seem too rough, is much calmer if the pocket has decent depth.
• Making false casts on small water can spook fish, so try to false cast away from your target before making the final presentation cast.

Hopefully something in here is useful or at least a friendly reminder.  Good luck on your own small creek.