i dont really remember how i motivated myself at first, i guess it started when i started to read women's health and when i got to watch dr. oz on oprah on a regular basis lol (i later bought his book - 'you - the owner's guide' - pretty good book imho!). All the education you can get out of things like that can really help you to change your mindset about food and exercise to the extend where you can successfully change your lifestyle (yes, that's such a cliche, but it is the only way to go - and really not as hard as one might think). So if you read a mag, like Men's Health in your case, that can be a good motivator, because theres a new one every month and then you have something new to look forward to.
Secondly, as above, a rewards system is great; what i do is i have one of those yearly wall calendars and i get a gold star for every day that i go to the gym (and a blue star for every day that i go running lol). that's something you can look at everyday and be proud of and work on.
Another great reinforcer is tracking your progress in a spreadsheet, so you can record your weight, measurements, how much weight you're pressing at the gym, etc etc etc, for every week or fortnight and then again you have a visual reminder of how well you're doing!
So i guess what they all have in common is that they're motivators that keep motivating; the magazine teaches you something new every month, the calendar gets better and better every day and the spreadsheet every week.
Your photo on your wall, thats not telling you how well youre doing, thats just bringing you down by reminding you of how awful you feel about your weight! if youre undertaking a massive change in your life, like losing weight, you should have something tell you that you're bloody awesome for it!