Step 1: Tools needed:
That's it, let's go!
Step 2: Shinin 'em spiders!
Shine the light on the grass in front of you about 6 to 10 feet away. You can find spiders much farther than 10 feet from you, but it is more difficult to walk up on them without losing exactly where they were.
Slowly turn your head back and forth and look for small "dew drop" like gleams in the grass. These are the eyes of the spiders reflecting your light.
Make a note of exactly where a gleam is located and walk directly to it, keeping the flashlight trained on that area. However, once you have pinpointed the location, it is not necessary to keep the light by your head because you will not likely see the reflection once you begin moving anyway.