I've been working with a number of clients who are all opportunistic. I like to consider myself as oppurtunistic as anybody - and I've learned that if you're not careful that trait will kill your business.
The reason for failure is rarely, if ever, a lack of opportunities - it's the failure to focus. Opportunism and focus don't always get along so well.
Here's my tip - stop doing something. Pick something that you think is important and make the decision that you are not going to do it. Take that time (and, more importantly, energy) and apply it to something else you are already doing (don't add a new thing). I promise you'll see better results - faster.
If you feel like it, share what you are going to stop doing in the comments section.