Besides the giving of food, money or your time helping...... we used to go to shut-in places. Basically the elderly, whether they have a lot or not, need attention and a feeling of being heard or talked to..... or just visited and still feel a part or wanted.
My wife and I, along with other couples in the Ballroom World would go to a different place week nights and some weekends and put on demonstrations of the various dances. This we did year-round about twice a month. There was a main group and we danced somewhere every week. We'd play music these people could identify with and when we were all finished dancing, we'd dance with the folks. I danced with women in wheelchairs, with walkers on oxygen and some without limbs. There were blind people who just listened and heard our shoes on the floor or the oohs and ahhs of the crowd. When you left a place like that, you really felt like you helped someone in need.
One time, there was a lady at one of these places and she was like 102 years old and said she was big into dancing back in the 20's before WWI and such. She still could dance up a storm at 102.
It's so rewarding to see all those smiling and happy faces.... then once you're gone, they almost all go into a zombie like condition...... until we show up again.