For the most part, this puzzle demands continuous attention and focus until you find the right route. However, here are a couple of suggestions:

1. Print out a copy of the puzzle, and then photocopy it a couple of times at a very light setting (so the lines are very light gray, barely visible). You want to be able to read the letters, but you also want your markings to stand out.
2. Whenever you find a cell that can't be entered from any adjacent cell, darken it. It is a barrier.
3. Start drawing lines from the left edge toward the right. Draw an arrowhead at the end of a line when it enters a cell it can't leave.
4. Working backwards from the right edge isn't very fruitful in this case, but you can try it if you want.

Note: The correct path actually crosses itself and crosses some of the wrong paths. Don't be surprised or discouraged.