One very easy and very effective bait on some waters that I have fished is very very simple.
White Bread
Extract (Vanilla, Maple, Anizs etc.)
Simple open a bottle of extract and place a slice of white bread over the top of it. Flip it upside down really quickly to get just a dab of the extract on the bread. A little is all you need, start mushing the bread slice around for a minute or two until you get a nice firm dough ball. place a little on the hook, make sure the tip of the hook is a little exposed (I normally puch my thumb in there to put an indent into the dough and expose the hooktip) and throw it out there. If that flavor doesn't work try another that is the great thing about this recipe, it is quick to change.