As Muslims we must strive to become better Muslims all the time with some recommended acts by our Prophet Muhammed (PBUH) such as Fasting voluntarily for the sake of ALLAH on Mondays and Thursdays, 3 middle days of each Islamic calendar.
Another way is to Make Muslim friends and avoid severing ties. Our beloved messenger of ALLAH Prophet Muhammad (PBUH) said, “On the Day of Resurrection ALLAH Almighty will proclaim: “Where are those who have mutual love for My Glory’s sake? Today, I shall shelter them in My shade where there is no shade but Mine. (In Saheeh Muslim).
Saying “Assalaamu Alaikum”
(Peace be upon you) to Muslims you set eyes on is a real blessing in Islam. It immediately let people know you are a Muslim and they usually will be happy to return the greeting and hopefully share a few words with you. Doors of friendship will be opened and you will meet lots of people. Try and spend some time with Muslims when you can. It is beneficial to remind yourself that you are not the only Muslim on the planet and you share your religion with over 2 billion people around the globe. But please no intermixing. Sisters to make friendship with fellow sisters and brothers to brothers.
Also, don’t damage your kindness with your non-Muslim colleagues unless if they are constantly partying or using the list of major sins as their weekend to-do list. You can be a light to your Christian, Agnostic, Jewish, or Atheist friends. You never know who ALLAH (swt) will guide, and showing that you are living an ethical life can encourage these people to learn a little about Islam or change their mind to having a positive view of the religion but don't make them your closed friends you rely on or tell your secrets to them as they can easily betray you due to lack of imaan even though some Muslims can betray you due to their weak imaan. Your relationship with them must be purely in trying to soften their hearts towards Islam.