Common errors in nutritional planning include inadequate calorie intake, neglecting macronutrient balance, and failing to consider hydration. Individuals often underestimate their caloric needs or excessively restrict calories, leading to fatigue and suboptimal performance. Another frequent mistake is focusing too much on one food group while ignoring others, potentially resulting in nutritional deficiencies. Additionally, not planning meals can lead to impulsive choices, further straying from dietary goals. Careful consideration of these factors is crucial for effective and sensible nutritional planning.