I guess one would just have to make a conscious effort at it until it becomes habit. Do it for 28 straight days and it will be. I do think that when we wear shoes, especially with heels, we tend to heel strike. To me if a shoe forces you to strike differently, then that is going to impact how your knee and hip move and could possibly lead to a new problem. "THE SHOE MADE ME DO IT, THE SHOE MADE ME DO IT!!"
Here are some things that might help. I work in my home office about 90% of the time, and usually go barefooted around the house. When I go out, I wear flip-flops almost exclusively, to my wife's chagrin. This might help me.
Try walking around barefooted, I bet you will find that striking on your heel is uncomfortable. Smaller surface area than the ball, less cushion, and nothing to flex, like all the bones in the front of your foot. Landing on your heel is a hard strike, landing on the front cushions each step. You will tend to walk more on the front, but probably not 100%.
I just looked at my flip flops. There are little designs all over the top of the footbed. Very little wear around the heel area, but a lot of the design has worn out under the ball of my foot, and my toes. Maybe the design of flip-flops makes me grab the the front to keep them on and make me strike more with the front? I don't know.
When you walk around town, walk fast or briskly. If you find you are bouncing up and down like a dork, you might be one... er, I mean you might be walking more on the front of your feet :) Also check your posture when you walk, that might make a difference.
When we hike, we probably walk about 50% uphill... just guessing that even a "flat" trail goes up and down. If we are not used to walking on the balls of our feet, we aren't going to do it, because our calves are not used to that kind of work. We normally will tend to go with a heel first strike. I don't think anyone is going to go front first 100% of the time.
The 10% I travel is corporate suit territory. Even then I don't wear the big clunky shoes that are in fashion today. I buy quality Bostonian or Johnston & Murphy shoes, which normally have thin soles and heels, since I dress rather "conservatively."
To be honest, I have never given it much thought until the past couple of years with all the interest here in minimalist footwear.
This is the problem I have with running stores who are "experts" at fitting you. If their philosophy is that that shoes and insoles will "correct" what your body does naturally, it might be counter-productive. Other stores may just try to put you in neutral shoes that fit, unless you ask for something else. Keep in mind that motion control shoes and insoles generally mean more profit.
"I ran cross country my senior year of high school. When at the Runner's Market to get 'properly fitted' for shoes, the guy had me go to the wall, take off my sandals and walk torward him. His only expression was, "Oh... wow... that's bad!"
I got fitted once for running shoes, a few years ago. I wanted a shoe for training on roads, and some extra cushion, thinking that since I was in my 50's it might be a good idea. It was a very well known store, and the employees are runners. First they started by asking what the intended use was. Then they measured my feet. Then they brought out several pairs of shoes. Then we went outside and they had me RUN up and down the sidewalk in each pair of shoes. The shoe I ended up with was a Brooks Trance 6. Made for an average arch, and high mileage. Brooks wasn't even on my shopping list. And it was the largest size I had ever purchased, size 12.