I am a huge advocate of a yearly anniversary trip. Aside from celebrating your marriage, a trip is a great way to pull aside and reconnect. If you take a trip each year, you can gauge how your marriage is doing by looking at how things have improved, or gotten worse, since the last trip.
I realise a yearly trip is difficult for most of us; I also think it’s a priority worth setting. Save up your miles and free stays. Look for discounts. Get family and/or friends to take the kids (even if you have to reciprocate) and burn up a few vacation days. Work a bit of overtime and/or cut back on something to make the money. It’s worth it, really it is.
One year we didn’t have the money to go anywhere, but we still wanted our anniversary time together. We told everyone we would be doing our annual trip and took our son to his cousins a couple hours drive away. Then we came home, unplugged the phone and covered the front window. We put a blanket on the floor and watched movies, ate snacks, snuggled, and so on. We did some no/low cost tourist things in and near our home town, and we broke into the change bottle to have one nice meal out. For almost nothing in money, we had our few days alone. If you are determined, you can do it.