Have you made any money yet?
If not, pick any method here at bhw, yes any method, and just say to yourself, "I'll do it for just one lousy little minute. 60 seconds. That's it. Then I can quit."
Do that just once a day for a month and actually spend those 60 seconds feverishly ACTING. Not thinking. Doing.
If it's CL posting, open CL and make a post. You can do a post in around 60 seconds. Pick a city, pick a section, open up and fire away.
Tomorrow, check your email for responses.
If you get a couple, that will motivate you to post again. So spend your 60 seconds doing another post.
Rinse repeat.
What will happen is eventually you'll get a sale.
It shouldn't be hard to stay motivated once you see that account balance change from $0.00 for the first time.
If you're already actually making money and you've lost your motivation, then you need to look at why you're doing what you're doing. What do you want? Why are you doing this?
New drum set?
Ferrari?
Weekend with 20 ladyboys in Thailand?
Whatever you're trying to achieve needs to be front and center in your attention at all times. Pictures on your desktop. A slide show for your screen saver. Hanging by your monitor. On the ceiling over your bed. On the mirror in the bathroom. Inside your refrigerator. Blocking your access to the coffee machine and the water knobs on your sink. taped to your dashboard near your odometer and/or radio.
Lack of motivation means you either don't want anything badly enough to do the work to get it, or you don't believe that the work will get you there.
The first one is cured by examining what you want then focusing on it with every fiber of your being. The second is cured by taking small, consistent never-ending steps toward your goal.
So: know what you really want, take tiny steps towards it every day.
Result: you will succeed eventually.