Some more tips´n tricks
Mix and match
If you have a couple of filter like a polarizing filter and perhaps an ND filter there is no rule that says you can mix and match the best from both worlds, you can use the polarizer to see through water, the nd filter to smooth out the sky and a regular shot for the rest of the landscape and combine the best from all worlds.
This does not just extend to filter use, as simple as doing a 30 second exposure of the sky at 1600 iso (to prevent star trailing) and a 2 minute exposure of the ground at iso 200 also works when it comes to mixing and matching, even part hdr.
It is all dependant on the scene you want to capture and your own creativity.
Most cameras has a multiexposure feature that enable the camera to process several image into 1, this is not the same as bracketing where you take several different value exposures and combine into one (hopefully) neat looking hdr image.
You can set up the camera to do 3 multiexposures and place yourself differently in the frame for each shot, effectively creating 1 image with 3 times you in it
Same goes for combining different subject, I have one in my gallery called "Tears" its 1 shot of a flower and 1 of the sky and cloud, creating quite a dramatic image, you might say its the easiest way to create abstract/surreal "photomanips".
The "remember list"
More in the helpful section, but having a remember list with you of things you should check can prevent you from coming home with those shots done with iso 2000 i daylight or too high whitebalance and such.
Once you are used to going through a little checklist it becomes second nature and you can focus on other things.
But there are other things that can be really helpful to bring along on any photoshoot, tissuepaper to wipe away dirt and water coming onto your camera gear (especially important if you are shooting near saltwater).
Things like screwdriver and any other things that lets you adjust your gear on the go, a screw loosening on your tripod and no way to fix it can put a stop to many shots.
Equally important, going overboard and bringing too much can put more weight than you want to carry on a long hike for instance, so pack lightly and efficiently.
Heavy fast moving clouds after a rainstorm can take on shapes that can look like anything imaginable, having a little bit of patience can get you a shot that you never would have gotten otherwise.
Anything that shifts fast can be worth to wait a little longer, do those 5-10 extra shots you normally would not do and so forth.
Same goes for sunsets, after the sun goes down, stay a little longer and shoot some more, perhaps you get that golden shot you hoped for.
Oh, and don´t pack down your camera gear while waiting, things can appear and dissapear in seconds, those seconds it would have taken you to get your camera gear ready again.