I've realized that one area that I've been slack in is investing my earnings back into my most successful site. I was wondering what the most sensible strategy is for reinvesting profits.
I'm sure this will vary from site to site, but let's say you had an informational red widget website, not ecommerce, just adsense and banners etc, and you wanted to pour some money into it.
Do you buy a faster server? Some text links? Some adverts? Do you pay people to post on your new forum? Pay an SEO company (a proper one) to advise you?
Does anyone have experiences to share about how you invested in your site for the better?