Answer: The two mistakes that practitioner and teacher makes are that they set the expectation very low as that present level of the performance by students and clients is not important to get a self administered reward .
The second mistake they make is they make the same criterion for low and high performers.
Explanation: Some recommendations for self administered consequences :
1. Select small, easy to deliver consequences
2. Select a meaningful but easy to meet criterion for reinforcement
3. Eliminate bootleg reinforcement
4. Put someone else in control of delivering the consequences
5. Use the least complicated and intrusive contingencies that will be effective.