Losing weight can seem like a daunting task. Most people can get their head around losing 10 lbs, but what about 50? 100? As the number gets higher, the task gets more overwhelming. That's why, to overcome a large, seemingly impossible task, you need to break it into baby steps.
Do you remember the 90's movie What About Bob? It's about a psychotherapist who has to deal with an obsessive-compulsive client who follows him on vacation. It's hilarious. The point is that the psychotherapist helps his client overcome his neuroses through breaking tasks down into smaller tasks that are manageable, baby steps!
When talking about healthy eating, it's all about breaking it down into manageable steps. Have 100 lbs to lose? Why not try losing 5 lbs. Is that still too overwhelming? Try eating 1 cup of veggies a day. Once you have that under control and feel somewhat comfortable with that, add on another step. At that rate, losing the 100 lbs might seem like it's going to take forever, but every baby step towards your goal weight, or towards healthy eating is a good thing. Don't discount the importance of progress. As long as you're moving in the right direction, you're doing well!
Similarly, making any lasting change means taking it a day at a time. Focus on eating well TODAY. Thinking too far ahead can also be overwhelming. I often listen to Rich Roll's podcast (which is great, by the way), and he often talks of this principle in relation to alcoholism. He talks about how recovering alcoholics should focus on not drinking today; to focus on your head hitting your pillow sober tonight, and to let tomorrow take care of itself. I use this principle in application to healthy eating. On Monday morning, don't worry about that you're going to eat on Friday at happy hour, just focus on making good food choices TODAY. Then, tomorrow, do the same thing, and before you know it, you'll have made it through the week making good choices.
It's easy to get overwhelmed with all the information out there on healthy eating, dieting, superfoods, etc. but lasting change will only happen when it's broken into chunks that you can handle. Everyone's baby steps will be of a different size, but that's okay, work at your own pace. Focus on doing what you need to do to reach your nutrition goals, and make the steps as baby as you need. Good luck!