Karmas are of three types Prarabdh, Kriyaman and Sanchit. The Karmas we are performing in routine are categorized as Kriyaman, Karmas we used to accumulate through our conscious or unconscious deeds or Paap & Punya are categorized as Sanchit, and the Karmas we carry from our previous birth are categorized as Prarabdh that cannot be changed. Good Karmas performed by you will naturally give you good results similarly wicked Karmas performed by you will torture you. However, it does not mean you cannot earn karmas in the present birth. In your success & failure, 50 % role is of your karma and 50 % role is of your Prarabdh. Taking advantage of Karmas entails the correct utilization of Kriyamaan, Sanchit and Prarabdh Karmas. Your subconscious or brain pattern is designed as per your Prarabdh thus when you work following that pattern you achieve success quickly but if you work opposed to your brain pattern you face failures. Working or making efforts as per your brain pattern helps you earn Karmas that escalate your Prarabdh. Pt Rahul Kaushal Ji has explained the Karmas in detail.