Hi, Madamlal!
Start here and here for some pointers on stacks.
Here is a quote from our SammyG from the Official SapienMed FAQ:
6. What are the signs that someone is listening to too many fields?
There could are few signs that can indicate someone is listening to too many fields. One being, nausea, dizziness, overly energized, mentally disoriented… as in mind overactive or super underactive… most common though… is feeling drained. Tired. Too many fields can sometimes be the equivalent of taking too many pills at once… telling your body to do this, to do that. It overworks it. overstimulates your whole system and causes strain. I would recommend taking it easy if you can.