Didn't market. Didn't network.
Didn't constantly hustle for clients.
Didn't outsource scut work.
Didn't down tools when clients were slow to pay.
Didn't develop/maintain a backlog of client work.
Didn't reject fixed price contracts.
Didn't renegotiate when projects changed beyond contracted scope.
Didn't filter free consults against probability they'd turn into a contract.
Didn't have my heart in it (and have since stopped).