Ask HN: As a small development team, how do you get projects?

We are a small development team and are doing mostly individual web- and mobile projects for our customers. We often have some resources left and are now thinking about how we can improve our sales process. Currently most leads come from our website (+adwords) and recommendations.

Is anyone in a similar position and could share some experience and tips? What do you think about external sales agencys?

We do all have CS degrees and experience in many technologies (python, php, java ee, react, react native, native android/ios, bluetooth, bluetooth, just to name a few), maths and algorithms, and also UX-design (including eye-tracking, prototyping etc.). Would you focus the sales effort on a specific direction (e.g. only mobile) or spread it on everything we can offer?