Here you go!
We have always centered around a them of the hobbies of the birthday person, i.e. movies, fishing, camping, cooking, etc.
All things gold.
Deborah.....I would go with their favorite color and things that they like such as sports, favorite team, music, and food. If you can get some pictures and display from years back that would be fun. Hope this helps a little.
Here are 20 ideas: https://www.countryliving.com/entertaining/g27630663/50th-birthday-party-ideas/
Deborah: you can find some cute stuff and ideas here: