Affiliate Marketing Secrets

I have a marketing business, and have put a lot of time and work into my business. Our projected numbers were off, and it took a little bit longer than expected to get things up and running, so I need to go about finding an investor or venture capitalist. Does anyone have any ideas of how to go about this? We have a solid business plan laid out and a niche concept in our market and region. I would just love any advice that anyone could possible give me.
Thank you!