ENEntrepreneurship is a key factor for economic growth, improving the competitiveness of countries’ economies and increasing social prosperity. Young entrepreneurs face a number of challenges as a result of the rapidly changing socio-economic environment. In their activities aimed at launching a business, young entrepreneurs need knowledge and skills on a wide range of topics related to finance, law, marketing, product management, etc. This is why more and more projects aiming at comprehensive assistance in launching a business are being developed. One of them is the project “Acceleration of Business Support Ecosystem” (ACCESS), which was co-financed under the programme Interreg V-A Lithuania-Poland 2014-2020. ACCESS strengthens entrepreneurial initiatives by improving business support services in Kaunas and Marijampole region on the Lithuanian side, as well as Suwalki and Bialystok sub-regions in Poland. One of the many results of the project is the creation of two publications on theoretical and practical aspects of setting up and running a business. These publications aim to popularise entrepreneurial attitudes and provide knowledge necessary to achieve success in business. Young entrepreneurs, before embarking on their brave activities, should check where and what funds they can obtain to start or develop their own enterprise.They should gain knowledge about the target group they intend to reach. In addition, they should focus on ways to communicate with the hypothetical recipient. An equally important aspect is to create a team that will work effectively. This publication consists of three chapters. The first chapter refers to the sources of business financing, the second presents the forms of employment of employees, methods of recruitment and selection, methods of motivation and tools necessary for team building. Chapter three deals with marketing aspects of business activity. The book is dedicated to young entrepreneurs as well as to those already existing in the market, who constantly have to generate ideas and adapt them to changing market conditions. Hence, anyone who intends to or already conducts business activity will find in this publication some development-stimulating content.