I really like this quote about journal keeping by Spencer W. Kimball (there were actually a lot of good ones, but I decided this one summed them up):
"If you have not already commenced this important duty in your lives, get a good notebook, a good book that will last through time and into eternity for the angels to look upon. Begin today and write in it your goings and your comings, your deeper thoughts, your achievements, and your failures, your associations and your triumphs, your impressions and your testimonies. We hope you will do this, our brothers and sisters, for this is what the Lord has commanded, and those who keep a personal journal are more likely to keep the Lord in remembrance in their daily lives."
And then one day, after 6 years- and 65 pages later- of keeping a journal on the computer (because while it's much less romantic than handwriting, it's faster to type and therefore more likely to get done), Satan will enter your hard drive and your computer will lose your journal file. Luckily, you will have thought to print it out a year ago, but still, the last year is completely gone. So much for lasting into eternity.
I'm not so sure I wanted the angels reading my journal anyway....