Anything that's different from your own realm of experience as a human being whether it's driving a car or a boat or using guns anything that separates you from yourself and leads you more towards this character's existence is a big help.
Wrinkles should merely indicate where smiles have been.
Anyone who stops learning is old whether at twenty or eighty. Anyone who...
Age is an issue of mind over matter. If you don't mind it doesn't matter.