I've read a number of articles on SEO and main navigation for websites. I'd like to get a solid answer/recommendation to help solve this one. This is the situation. We're helping a local business that offers pest control and property maintenance services. Under each of these, there area a number of services available, eg, cockroach control, termite inspections or lawn mowing services, rubbish removal and so on. Is it best to have a main nav containing the top keywords for the services - Pest Control | Property Maintenance, with a drop down to the services under each. Or, a simple approach - Our Services > drop down to each - Pest Control > Termite Inspections, etc. My concern here is that they have quite a lot of services, so the nav could be way too long. Really appreciate any assistance here. Many thanks.