Back in my day (LOL), we made it a point to go on a date once a week. When money was tight, we'd do a cheap date, like going to the park, going to a dessert shop to have coffee and dessert, or whatever.
Another MUST DO in my book was going on an out-of-town weekend trip every month. If finances don't allow, you should definitely try to take one every few months. We found a great B&B in the mountains about 90 minutes away that was only $75/night off season, so for the weekend, we'd spend $150 for lodging, maybe $30 in gas, and our pocket money budget would depend on how we were doing financially. One time we went and were pretty broke, so we just "stayed in" most of the weekend.... which was fine by us.
All in all, the trip could cost us as little as $200, if need be. That's pretty cheap for a weekend trip for 2. And it works wonders (especially if you're in the mountains and your cell phones don't work).
Another thing you can do is commit to sharing at least ONE meal together every day, and once in a while, do something special. Either get all dressed and stuff, light some candles, play some music, cook his/her favorite meal whatever...
Another thing we did was "3 Things" every single night before we prayed together. We would each tell the other 3 of the things we love about the other, and the rule was, even if we were tired, annoyed, or whatever, we still had to do it. No matter what. Then, on Wednesdays, we'd add "1 Thing to Work On."
Flirt a lot. Via phone, text, e-mail, leaving notes around the house, whatever...
Keeping it fresh means doing things you don't normally do. So, once in a while, do something you don't normally do, whatever that might be.
Communicate daily. Ask him what HE thinks you could do to keep it fresh...
For now, that's the best I can give you without getting PG-13.
