This is tutorial #1 in my in-depth, How to Paint Water Tutorial.
Here are the planar perspective grids I use in my How to Paint Water 2: Point of View video. Look below the video for the links!
1/3 Horizon, High Point of View
1/3 Horizon, Low Point of View
2/3 Horizon, High Point of View
2/3 Horizon, Low Point of View