I shamelessly steal. I have most of the 1e, 2e, 3e and o5e books. I convert the information from the original source into the LU5E format. This is very easily done for heritage, but I may have to get creative with the gifts. This is where I look at existing gifts to ensure I maintain the power balance. I use the LU5E cultures as much as possible, but if necessary I create new ones. Between regular D&D expanded races, Dragonlance, Star Wars and Usagi, I have converted well over fifty heritages (maybe closer to ninety) and a handful of cultures. Some of my players love to Min/Max, others barely know the rules. For this reason, I convert systems to LU5E to streamline game play. This may sound like a lot of work, but if you enjoy world building and are a control freak like me, you can seamlessly mesh these into your campaign. Can you tell that I am a forever GM? I started my main campaign world in 1988 and now run it for my children and their friends.