can someone tell me how can i make more money on my lot

You need to start discussions, like you have done here, respond to discussions stated by other members, try to make quality responses so you have a chance of getting a 'best response' or even a positive (+) rating. If you can get some other people to join under your referral and for them to make lots of postings, then they will also earn and you benefit from their contribution. Good luck and keep on posting here and you will make money. :)