Welcome to the forum. I am sure others with a lot more years FF'ing under their belt will share thoughts. Meanwhile, here is what I have learned fishing medium to small sized streams. These are tenets that I adhere to when I fish such water...
1) Practice stealth..wade into the water only when absolutely required. When you do enter the water, wade very deliberately (minimize wake).
2) Slow down all movement...do not have any 'shiny or bright' colored things on or with you ...e.g. use dark or matt finished tools, reel finish etc.
3) Use a lighter line weight tackle...e.g. 5wt max. (unless you are fishing a smooth casting bamboo 6wt).
4) Keep your casts short for better line control and to avoid any drag. I have noticed that in gin clear water, even the slightest drag (I mean...really slight) spooks fish.
5) Pay attention to your terminal tackle (leader, tippet etc). Sometimes short leaders are more effective than super long ones.
6) Take the time to really research the hatch activity during the period you plan to fish
7) If you cannot locate any hatch info., start with an 'attractor' Dry-dropper system (Parachute Adams or Stimmy + a BHPT or HE or CopperJohn Nymph). In the middle of summer, a beetle or ant can also be an excellent searching pattern.
8) Hike a bit away from the typical (i.e. near the popular access points) entry points into the water
9) Hope (believe
) that there are fish in the stream
10) Since you have been FF'ing for a while, you probably know about the type of lie's trout prefer. If you require more info, listen to a few of the free Orvis podcasts. OR you can always get the same info from the multitude of literature out there.