Any easy way to find interests?

I thought it you already added them then they would already be there when adding others. No there not in alphabetical order, but you can add as many as you want to make more responses to discussions. I thought it was an easy thing to do, but i guess not for everyone. I hoe i was able to help even though i really didn't say how to really add your interests even if you already added them. Maybe they don't show up after you have already added them.