Vegetarian until 6PM and New Fitness Minutes

I'm starting to get more focus on what I want to accomplish. For the month of February, I've decided to do the following. It's a short month, so if it doesn't work out, I'm not committed for too long!

1) Eat 'vegetarian' until 6PM. While I've dabbled with the idea of vegetarianism at various times in my life, I simply find it is too much for me. It's a lot of work balancing nutrients, and vegetarianism requires a lot more discipline then I am able to manage. My fiance would absolutely refuse to give up meat, and I'm not interested in preparing two dinners. However, I do like the idea of *less* meat. I recently read an article where the author said they are vegan until dinner time. I love the idea, so I'm borrowing it to be ovo-lacto vegetarian until 6PM (cheese or eggs, no animal flesh). My fiance doesn't like things like quinoa, but I do. I can make it for my lunches. Ovo-lacto vegetarian for breakfast and lunch could work for me. Dinner will be regular meals of reasonable portions of fish, meat, or poultry. So for the month of February, I am going to try it.
2) Increase weekly exercise to 300 minutes. I recently read an article that says health professionals are increasing their recommendation from 30 minutes 5 times a week to 60 minutes 5 times per week for individuals that want to lose weight. In the past, I lost the most weight when I road my bike after work 1 hour every day. So this fits with me. I've done it before, I can do it again.

I've been in a rut, so these two things shaking things up should give me something interesting to challenge me.