Decide which cloud-mining service provider to use. There are a number of different cloud-mining service providers available, some of which are better established than others. Each service charges different fees and has different contract packages available.
Genesis, Hashflare, and Minex are some of the more popular cloud-mining services. However, the most popular services with the best reputations also are frequently sold out of contracts.
Research services carefully. There have been numerous cloud-mining scams. Make sure the company is legitimate and has a good reputation. You can search the name of the service and see what people are saying online about it. Websites such as CryptoCompare can also help you analyze company reputations.
Be careful of a cloud-mining service that makes guarantees or claims that sound too good to be true. It is likely a scam. No cloud-mining service can guarantee you a particular rate of return, or guarantee that you'll break even or start turning a profit in a short amount of time.