Virtue: "When a man passes away, his good deeds will also come to an end except for three: Sadaqah Jariyah (ceaseless charity); a knowledge which is beneficial, or a virtuous descendant who prays for him (for the deceased)" - Narrated by Abu Hurairah, Sahih Muslim
I'd like to kindly share two easy ideas:
1. Donation to the Mosque - give whatever you can, it's not about quantity it's about quality (sincerity). From the day of your donation to the Day of Judgement, for every single person who benefits from the Mosque (your contribution) you shall also get reward (without them losing any of there reward). Think about it - every letter they recite, the Quran, Azkar, Salah they read. Now imagine when you contribute to more than one Mosque? Don't delay, make it a reality right now.
2. Give away unneeded clothes / items lying around in the house to charities / unfortunate - it might seem worthless, but to people struggling severely in need it is priceless.
Reference: Narrated by Abu Hurairah, Sahih Muslim – Book 13 – Hadith 4005