I'd start making a note/ spreadsheet of where your advertising is working.
Ask clients at end of booking hope you don't mind asking but where did you find my details?
Some might say aw, or another directory or viva street. Then make a note and after a month look at how many come in from aw/ viva or other directories and drop the ones not working.
Adultwork - main one
Aw - available today I find personally really works . If I don't do it, work slows down.
Touring section, LES, and some escorts pay the featured escort advertising which is roughly 40 credits a day. I've never personally do the featured I've heard mixed results.
Also maybe give your profile an overall , see if you can make it stand out from the crowd. Keep your free gallery and pics updated reg - even if selfies, clients love new photos, also consider writing a few blogs.
Other directories
Try some free directories such as escortrankings, adultseek - doesn't bring in loads of work but a few here and there which will bump up your money on a quiet day.
Vivastreet I no longer bother with - too many tw but it may be worth trying the " new" feature or other featured options. All depends on what area in country you are. And i think it's £2.99 for a website link , that's worth paying for if you have a website.