I tell my consulting clients that there are only three ways to make more money: get more clients, charge more, sell your existing clients more stuff. Most devs

I tell my consulting clients that there are only three ways to make more money: get more clients, charge more, sell your existing clients more stuff. Most devs are under-charging. Getting more clients is expensive in terms of time and support. What almost everyone forgets is that it's far better to sell your existing clients more stuff than to get a new client. When was the last time you called everyone you've worked with and asked them how they are doing, how things went after you were involved. Get in the habit of asking them which of their friends might need some work done. It should always be your last question.