We've all heard of the 'golden hours' and it's during these special hours that you'll find warm light. Warm light is perfect for landscapes, particularly those taken at the coast, because it will bathe scenes in a gorgeous golden light.
For sweeping beach scenes a wide-angle lens is perfect but you might end up featuring people in the frame. This isn't a problem as it will give a sense of scale to your shots, but wait for people that complement your scene.
As the sun gets lower you may find a tripod useful; lightweight tripods are portable but a stiff coastal breeze can wobble them and ruin your shot so watch for this. Hanging your camera bag across the tripod's shoulder will enhance stability - make sure the bag does not bang into the tripod, though. Another tip is to protect the camera from buffeting by standing in the wind.
It is worth enhancing the already warm light with filters. Amber colour correction or warm-up filters will remove blue haze from shadows and add more warmth to your scenic images.
You'll find that sunsets appear to be warmer than sunrises and this is because of the pollution that builds up through the day and scattered through the air. Some subjects such as sand are warmer so will work well in warm light. If you think your images need slightly more warmth try adjusting the white-balance or if you're shooting in RAW, you can make the changes in post production when you're back from the coast. Plug-ins to emulate film effects are also worth using.