I picked up a few sayings from my dad...
When asked something like when someone would see him again my dad will say, "Someday soon or Sunday noon."
When getting ready to leave after a visit, my dad often says, "Glad you got to see me."
When he has to go to the store to buy something he says he is going to the ____ store (whatever he is going to buy). "I'm going to the glue store." I'm going to lightbulb store." "I'm going to the underwear store."
When it is time to eat we all say it is time to "Wash your front feet."
Someone else already mentioned this one, but my mom used to say, "Hold your horses" a lot. I say that one now too.
One I just started saying one day when my daughter was younger was (when I'm talking to my daughter or a kid) "Okey Dokey Kidokey." (James says, "Okey Dokey Karaoke.").