Remember y u started and visualize were u wanna be...
Be clear about your goals, it will help motivate you, and you will see results quicker.
Well to motivate myself, I look at everyone else around me (family & friends) and say "ok thats where I DO NOT want to be". I am the only one eating healthy so its a bit difficult with all of the temptations but I also visualize what I want to look like in my bikini since summer is coming, which helps a lot! You could also buy a New bikini/bathing suit and that could also motivate you to look good for when you finally wear it! Good luck.
Keep it fresh by getting involved in a new sport, start exercising with a good friend, sign up for a race, challenge yourself with new short term and long term goals. . .
Let others know your ambitions so that you will be held accountable. Also, you will possibly spark a flame of inspiration in them as well.
Music is key. But think of an professional sport idol you have an tell yourself you have to beat them.