The most common motivational tip people get when gearing up to lose weight is to look at a picture of themselves when they were smaller or find a picture of someone else that is your goal look. I have a different couple of ideas.
1. Write a list of 20-30 things you will be able to do once you lose weight that you can't or don't do now because of your weight
2. Imagine an outfit or style you have always liked but that never looked good on you. As you are starting on your weight loss journey work on getting closer to that look. Being confident in your style is more important than your actual size. A small amount of weight loss can give a huge confidence boost.
3. Do a little research on just how large your risk factors drop for fairly small amounts of weight loss. It is a great feeling to see yourself getting healthier.
4. Make a plan to go do something that your weight or size prevented you from doing. For example, some people are too large to enjoy going to amusement parks because they feel stuffed into the rides. Or, better enjoy a social setting that you felt like an outsider because of your size.
I personally most look forward to being able to be more physically active doing things like biking and jogging, as well as the idea of being able to run up a flight of stairs in a hurry or run a short distance to catch up with someone else without being out of breath at the end! It's the little things that will mean the most to me.
If you get discouraged easily just take a look at this image: