This is the most obvious one. You can sell the land and put the money in the bank and have a monthly profit on it. You can also just sell it and keep the money with yourself and spend a monthly amount. The ideas may not be ideal overall as there are many other uses of the property as well which can be more beneficial.
Depending on what kind of land you have and where it is located, you can rent it out. If it is in an agricultural area, you can lease it out to someone who will be farming on it. Land in a commercial area can be used for various purposes that are commercial in nature.
You can increase your income from the land by constructing a structure such as a building on it. You can make a house and rent it or sell it or in case it is a commercial property, make an office building on it. Renting it out may not be a bad idea as it will give you good income and the value of the building will appreciate over time. So you can sell it later on for a better profit.
You can mortgage the land for money and invest that in a different business. This is a good idea if the land is of no real use to you and do not feel like spending more money on it. If you have no intention of selling it in the near future and feel that the business in which you have interest in can earn you well, it is not a bad idea to take a loan against such a property.