I especially feel guilty when something good happens for me or to me, at the same time that something like Haiti's disastrous earthquake happens. It doesn't seem right to enjoy myself when so many thousands are suffering.
When this happens, I usually try to sit myself down and have a good talk with myself. I have to remind myself that God never promised us a rose garden, true, but he didn't promise us unending misery, either.
The easiest way for me to deal with it is in my nightly ritual of thanking him for the things that went right that day. In those moments of my "Thank you, God, for..." list, the pleasures of the day fit right in. I can remember them with joy and pleasure, and in the right frame of mind. That's when I realize how good God is to me, to us.
Thank you, Dear Father, for all the times you have blessed me with some of life's pleasures and helped me to enjoy them the way you hoped I would.