Maintenance/Inventory logs for my train collection

As I started collecting more trains, I started keeping an inventory of my trains.  By doing so, purchase records could be kept for insurance purposes, creating contacts for past sellers, and tracking maintenance on my trains.  I maintain all of the trains that are purchased as soon as i receive them.  Whether it is oiling axles on freight and/or passenger cars, replacing old grease on locomotives, or making repairs, I no longer rely on only my memory for determining when I last maintained a specific piece of rolling stock.  I set up a document on Excel, and regularly update it.  Does anyone else keep similar records?  If so, I would be interested to know what means of keeping records that are used.  Are there any programs that exist that would be better for record keeping than what I use.

I wish everyone Happy Holidays, and hope that you all have pleasant childhood memories of playing with trains!  Nothing better for me than reliving the generosity of those who were responsible for starting me on a lifelong hobby of trains!  I hope to return the favor.