Keeping things fun after 13 years?

What is the one bit of advice you would give/thing you would want most from your spouse to keep things fun and new in a long term relationship?

It's coming upto our anniversary and it's been a while since we've had some time to ourselves I'm looking for some inspiration - things to do during child free time or while trying to work around the kids underfoot/in the house.

Keeping things fun after 13 years?
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