I have not tried chat or click-to-call solutions, but they seem interesting. Depending on the pricing of the service and difficulty of implementation it might be worth it for us.
I have found that many articles talk about analyzing and optimizing cpc and cpm campaigns which is great for bigger sites with phenomenal traffic and online exposure. However, for small boutiques like Izola, I have found that these 3 tips have the highest value (income/time) ratio.