To improve flexibility over time, the best approach is to implement a regular and varied stretching routine. Incorporate different types of stretching, such as static, dynamic, and PNF (Proprioceptive Neuromuscular Facilitation). Aim for at least 2-3 sessions per week, holding stretches for 15-30 seconds to gradually elongate the muscles. Always ensure to perform stretches safely and without pain. Additionally, practicing activities like yoga or Pilates can enhance flexibility while promoting overall body awareness. Consistency is key to achieving long-term improvements.