quake in one's boots
to be afraid, to shake from fear
I was quaking in my boots when my boss told me to come to his office.
Daily Meditation can Improve your Life
Do Not Stress
This may be the most important tip for beginners, and the hardest to implement. No matter what happens during your meditation practice, do not stress about it. This includes being nervous before meditating and angry afterwards. Meditation is what it is, and just do the best you can at the time.