If you are a selfish person, you may not harm the people around you directly but you will never be able to become a blessing for others. Therefore, you must get rid of the human instinct of selfishness that is present in every person. Your priority should be others and you should always be thinking about ideas which can help people in your surroundings.
Do not consider any deed to be small or low
If you really wish to be regarded as a blessing for others, you must not consider any act to be small or low. Even if you have to clean a road or to pick garbage in front of someone else's house, you are doing a great service to society and there is nothing to be ashamed of.
Religion & Spirituality
No matter what religion you belong to, you must look to enhance your connection with God. Every religion teaches its followers to be good towards others. If you truly believe in God, you must make efforts to please others. The two major religions of the world by numbers, Christianity and Islam, put a lot of emphasis on ‘human rights’, with the Bible and Quran elaborating the rights and the duties of a human.
Follow your religion with a spiritual angle as it will go a long way in helping you become a blessing for others. Keep in mind that the ultimate goal of spirituality is selflessness.
Never be harsh towards others
Even if you cannot go a long way in helping others, you should make a deliberate effort to behave well with everyone, irrespective of the differences of religion, gender, race, caste or creed.