Early-stage MSPs should start by investing in an MSP-centric professional services automation solution, or a PSA. A PSA is the brain of the company. It's what you'll need to have in place to run your own business efficiently (and scale). The next item on your list should be the remote monitoring management solution, or RMM.
RMM solutions allow MSPs to monitor and manage their customers' IT environments and proactively address issues as they arise. Identifying and addressing risks before a customer realizes they exist is one of the best ways to demonstrate the value of an MSP business. Starting a managed service provider business is hard work and requires careful planning to be successful.