Ask a hundred grizzled anglers this question and you're likely to hear one name pop up more than any other: The Woolly Bugger. In terms of sheer pounds of trout tricked, the Woolly Bugger ranks as a serious contender for the title of all-time champ.
What does it imitate? Some say a baitfish. Others argue a nymph or a crayfish. Then again, perhaps it mimics a hot dog laden with condiments. The important thing is that it works.
When dry flies or nymphs won't produce, tie on a Woolly Bugger and swing it through a juicy-looking run. Retrieve your line with quick six-inch strips and brace yourself for an electrifying strike. Your odds of a catch increase if you fish Buggers during the low-light periods just before dawn and just after sunset.
As for sizes and colors, you've got a wide spectrum to choose from, but it's hard to go wrong with #10s and #12s in classic black. And a bonus: It's one of the easiest patterns to tie.