The second thing you need to do is start designing an app. It can be Adobe illustrator, or anything related to design. It is also important to know that you need to set the colour mode to CMYK. The K value needs to be set to a value of 100 to make sure that the end result will be sharp. If you are not familiar with design applications, don't worry. Now, there is sticker design presets that you can use as a reference. Not infrequently you can download it for free. You can also take advantage of the services of a graphic designer or take preset sticker designs and services that have been provided at several printing shops, such as at a sticker printing Singapore, today. 

The third thing you need to do is determine the material to be used. There are various materials that you can use on the sticker that you will make. A Mirrorkote sticker is a popular option and one of the cheapest. The specifications are glossy surface, can be written on, slightly water-resistant, and non-tearproof. One other option is a kraft sticker, non-tearproof and non-waterproof, but can be written on easily, and is one of the most popular materials now. 

Hopefully, these short tips will give you an idea to start. Easy, isn't it? You can unleash your creativity by using a sticker. Good luck!