1. First and foremost is using the skill to stay calm and focused even under pressure. You can sustain a calmer more relaxed state by making meditation a daily practice, taking a nature walk, enjoying some art, dance and/or music.
2. Intuition can be developed like any other skill. It takes time, patience and practice; so in order to sustain your motivation, you need to be clear about your purpose or big why you want to develop your intuition.
3. Logic, reasoning and critical thinking skills are the polar opposite of intuition. Being playing and making a game of your practice sessions will assure you more creative/intuitive expression.