I like to do this and I don't do it often enough.
When I am having a lousy day or I am just feeling depressed and run-down, it helps me to I stop thinking about myself and start encouraging others.
I like to get a whole bunch of greeting cards and start to write away. I pray and think about who might need some encouragement, who is going through a difficult time, and that is who I write to.
Sometimes I don't even write. Sometimes, my heart is just burdened to pray. Today I even cried as I prayed for one family and the things they are going through.
I want to fix everything and make everything better, but I CAN'T.
So, I bring my prayers and petitions to the One who CAN.
...And I can pray and encourage and uplift others. It may not fix things, but it sure does help me to feel better and I hope it makes them feel better too :)