Before you take on a new supplier, ask them what they will do to help drive shoppers to your business. Specifically, ask if they have a link on their website to their stockists and whether they would add you to the link.
If there is no link then the relationship will not be as valuable as it may be – especially if the brand is well known and sought after.
The more suppliers linking to your business the better.
In terms of existing suppliers, check out how they promote small business retailers compared to big business. If they favour the latter over you, have a conversation with them.