As a designer, there are plenty of things to do actually if you want to start a business by your self. Design is everything and everything need to be designed. From very little thing like pen, keychain and pin until the big one like machinery. It is a good idea to start a business by making personalized things like pin and pen.
There is an idea to make personalized man cave mugsand sell them online. People love to have their things personalized so it is a good business.