The most succinct definition of taqwa is to guard oneself from the displeasure of Allah by guarding oneself from the disobedience of Allah.
We must guard our eyes, ears, tongue, hands, feet and even our heart from any act, thought, sentiment and emotion of disobedience and displeasure.
How does a person develop taqwa? There are many ways of developing taqwa and one of them is by fasting. Allah prescribes fasting for us so that it may create this consciousness of Him in us:
يَا أَيُّهَا الَّذِينَ آمَنُواْ كُتِبَ عَلَيْكُمُ الصِّيَامُ كَمَا كُتِبَ
عَلَى الَّذِينَ مِن قَبْلِكُمْ لَعَلَّكُمْ تَتَّقُونَ