1. Be Specific
Know what you want and don’t get sidetracked! I learnt this the hard way and have wasted many a days scrolling through eBay. If you are looking for a specific item be specific in your description eg. Zimmermann Black Jumpsuit 3 (that includes the brand, the colour, the style and the size). If you are just perusing still be specific, only search for brands you know that you like eg. Zimmermann. The more detailed you can be in your search the easier and faster it will be to find what you want.