A couple of months ago one of the church leaders in the area gave a great talk on this subject. He talked about how sometimes he sends out an invitation to himself to attend a pity party and he always accepts. He then spoke about how we can combat these feelings. We have much to be glad about. Think of it, the Savior has overcome the world. Why shouldn't we be of good cheer (See John 16)?
So next time you consider sending yourself an invite to your own pity party think again, and instead consider what Jesus Christ has done for you.