If you are in the Planes Of Oblivion and need to get past something such as lava, get a Walk On Water spell and a Health spell. Use the Walk On Water spell, then switch to the Health spell and run. Note: The Health spell is for your health when you get burnt.
If you use something that gives you water walking while in the Plains of Oblivion, you can run over the lava and take very little damage. This is helpful when you have a closed gate in front of you. Instead of having to run all over, you can just move around it; or from where you start, go straight to the tower with the sigil stone in it.