Here are the categories I started out with...
GENERAL - Largest group,everything that didn't fall into other areas. Just papers I love and I organize them by color within the general area.
TRAVEL - Cruises, Hawaii, Mexico, Car Trips, etc.
FAMILY & FRIENDS - Papers with wording or sentiments that I feel would be used for Family and Friend pages. My heritage paper is in here also.
KREIG - This is my husband. Anything specific to us really. I could have labeled it Kreig and I or US. We have a Harley, a boat, a tent trailer, so anything that fails into things we do together.
HOUSE - We bought a house 3 years ago and it is still a work in progress. I love documenting the upgrades we do ourselves.
HOLIDAYS - Any holiday goes into this area, grouped by time of the year. I group my starting with the first major holiday Valentines Day, so Christmas and New Years are at the very back.
BABY - We don't have children, but have friends and family who do, and I also use my paper for card making and love to use these papers for baby cards.