What else should I advertise on a magazine subscription website!

[Magsite]

Hello all.

I recently increased the width of my magazine subscription (http://www.magazinesubscription.co.uk) website to try and accommodate some banners down the side.

I've noticed some other magazine websites have banners on their for thing's like mobile phones and sky etc..

Do you think I should add just magazines or maybe try other things too?

Thanks Mally