[Wheetie]

All depends on your budget - Organic SEO (you control the sales lead funnel) is the best long term strategy.
The negative - it takes monitoring & time plus a monetary investment be either in-house personal or outside marketing.

2nd question - are you just looking to keep yourself in leads-deals - or are you attempting to keep an office busy.

If you have more time than money - go old school

I spent 50k last year on SEO and didnt get one good deal thank god for the tax write off.. We do nothing but pound data and fund at least 1.5 every month