Find out some improvement points of existing transportation service in your community and try to improve it, by opening your own transportation service.
Conduct research on market trends, customers perspectives, customer needs and preferences and sell them with potential customer-business company.
Do research what type of software are more helpful for business companies then develop software and application with your team and generate huge sum of money.
Computers and mobiles devices have become a part of daily life. And also these parts required daily service and maintenance, see opportunity here, open private service provider for these gadget, such as maintenance, cleanups, virus-cleanups etc.
Open event management service company and organized special events, parties, festivals (musical, food).
Professional consultancy service business ideas. stars your own consultancy service business, and provide your expertise.
Micro lending service is very lucrative service business ideas. This money lending service also directly helps to improve overall economy. Think about it, if you have liquid cash funds, this idea is great.
Add this to your list if you are planning to open profitable service business in medium scale.