What everyone else said!
Marketing is crucial, paying for ads is crucial, endless effort is crucial - if you want to be super busy!
Here's an example:
+ AW - gets updated every day with any changes to my availability, I add my blog posts to it, update photos, and continually try to improve the information and layout (I pay for local escort search and phone number display every day so that I am included in the maximum search results, I only pay for profile featuring if I am going on tour and I haven't had to use available today in my base city for quite a while as I have been booked up fully in advance)
+ Website - as above plus weekly SEO improvements
+ Twitter - multiple times per day of updates, commenting and sharing other peoples' posts, uploading photos
+ Curious Cat - anonymous Q&A app that links to my website and twitter, clients get to ask me questions and I answer them: it's a good marketing tool and adds to my twitter as content
+ Blogs - I aim to write one per week, which gets uploaded to my website, AW and linked on Twitter
+ Mailing list - formed from subscribers of my website, I send out a monthly newsletter which includes links back to my site to increase the footfall on my site, which then improves my ranking on Google
+ Directories - I am currently listed on 14 directories, each requiring a written listing that gets updated once per week if required
+ Additional ads - I pay for 3 ads separate to anything else, which requires me to update to keep them near the top of the search
results
+ Clip sale sites - I sell clips on some sites, which again, links back to my website
+ Link backs - all ads and directories link back to my website to increase the footfall, and therefore, the ranking on Google
+ Professional photos - I have had 2 shoots in the last year
I am practically glues to my laptop in the evenings ensuring I do all of this. Since making this tremendous effort starting in January, I have never had a quiet day. My calendar is booked out and clients are now booking weeks and weeks in advance. This is not due to a change in my service, my service is the same; but it's a change in my marketing and the effort I apply. It takes solid hard work to get to the point I am at, but so worth it to see a nice full diary with regulars knowning that it;s unlikely they will cancel.
Maybe it's time to stop over analysing where the problem can be and start changing the variable to determine what WAS the problem. If you change your marketing and you start getting busy in your own city, then you know it was the marketing that was the problem. If you try another city but don't change your advertising, then you know it was location that was the problem. If you improve your service but none of the other variables change and you start getting repeat clients, then it was your service that was the problem. Only way to sort this is to try different things but maybe only one at a time so you can pinpoint the problem area.