Answer:
Use strong judicial tools as patents and copyrights. Be flexible to enter the market. Understand that is more expensive to acquire a new client that to maintainn and excisting one.
Step-by-step explanation:
The powerfull companies can make a product or service look bad (sabotage) or can change its prices to eliminate possible competitors from the market, they also have a huge share of the market so there are not many avilable new clients to gain.