Some important acts of worship/good deeds in the month of Ramadaan:

 Fasting
 Quran Recitation
 Taraweeh
 Eitekaaf
 Searching the Night of Qadr
 Charity
 Umrah
 Nawaafil (Voluntary Prayers/acts of worship)
 Feeding the poor
 Supplication & Remembrance of Allah
 Repenting & asking for forgiveness
 Saving oneself from sins
 Increase one’s Taqwa

Most importantly, train oneself for saving from wrong deeds and talks and hurting others. Its not just about abstaining from food and drink. Its about saving oneself from the wrong acts!

It is related that Abu Hurayra said that the Prophet, may Allah bless him and grant him peace, said, "Allah is not in need of anyone abandoning his food and drink who does not abandon lies and acting by them while fasting.