I own and operate a new online retail company Her Choice Jewelry

I have never used affiliate networking before as a means of marketing. Currently I have registered with ShareASale.com and given a two tier commission both consisting of 15% of sales with an average sale of 55 dollars. Lifetime of cookie or whatever the company uses to keep track is set to eternity. I feel like my commissions are good but maybe someone could suggest lowering or raising them after taking a look at my site <snip>.

What steps should I take to get attention of affiliates?

Also what size/color banners should I have?