@Bryan Clement @Andrew B.
I certainly notice a correlation between exercise/what I put in my body and everyday work success. Yesterday I had a big BBQ meal for lunch and didn't exercise, safe to say was a pretty unproductive day. Today I biked to work, crushed fruits, veggies, chicken, and eggs and it's been a whole different story. Here are three things I would suggest through personal experience, a lot of great points already mentioned:
Have a "why":
After a few workouts, maybe even a month or so there will be a time where yah think hmm I don't feel like exercising and eating right this week. Having a "why" really helps you get through this. For me, its how I look. Yes, there is plenty of other benefits but that is honestly my biggest motivator. After my aforementioned lazy day yesterday I was just chomping at the bit to go today. Maybe it's your kids that motivate you, maybe like you said its how productive the rest of your day is, regardless as Simon Sinek says "Start With Why".
Start with something small
The best way to start may just be taking a walk around your block 3 times a week after work or maybe somewhere during lunch. This might sound incredibly simple, but its something everyone can do and you suddenly you start building a routine. "Small" means different things to different people, but just like in real estate it's not a good idea to start with an 80 unit building if it's your first deal. Another example, if you always eat out, try cooking a meal for one night this week. Small attainable steps to get the train moving!
Meal Prep
This is by far the most helpful thing I do, helps me save money and eat right. Might sound a bit odd but Sunday afternoons I make a big batch of a few meals and boom, have lunch and dinner for the week. For example, yesterday it took me 3 hours to make tacos and slow-cooker salsa chicken. Now all week just a minute in the microwave and I'm ready to go. Make my own trail mix using the same idea. Honestly, don't have the motivation to cook every night so this strategy is perfect for me.
Random Tips:
Go to the grocery store on a full stomach and with a plan. Honestly, if I don't buy junk food, I'm not gonna eat it. At least for me, I'm motivated to eat what I buy from a monetary standpoint. And if there isn't any junk food to eat the healthy food gets eaten.
Just cause its healthy doesn't mean it can't be delicious! Hummus, guac, salsa, are all big winners in my book. Sweet potatoes and the aforementioned trail mix are also a personal favorite.
Start working out with friends, family, or a group class. The accountability can really help you keep moving.
Make it convenient! My gym is on the way home from work and only a mile away from my apartment. Food is prepped and ready to eat. Help get rid of the excuses.
Agree with @Jay Hinrichs water can be your best friend!
Hope this helps, don't hesitate to reach out with any questions you have!
Grant