[evagaba]

The book Professional No Limit Hold Em mainstreams a concept called PSR or Pot to Stack Ratio. This concept really helped me understand, against unknowns, when I can go with a Top pair hand and when to slow down.

PSR is used to indicate how much is in the pot compared to how much is left in your stack (or the smallest stack in the pot).

Example, if the pot is $9 and you have a $90 stack, your PSR is 10. (90 / 9 = 10). Top pair type hands tend to do well with LOW PSRs and play badly with HIGH PSRs (when you are deep as others have stated). If your PSR is in the 4-7 range, you may want to play it fast, otherwise practice pot control.

I understand this is a little beyond beginner and others has basically stated the same thing...but PSR really helped me with TPTK type hands.