You have main options. 1. You work on a project which uses one of the existing technologies you already use. Maybe improve a library you make use of, or, opens

You have main options. 1. You work on a project which uses one of the existing technologies you already use. Maybe improve a library you make use of, or, opensource some code which you already have. 2. Learn a new language. This is quite a nice option as it means you can get out there resolving a few bug tickets which have been left open etc. When push comes to shove dont over think it or you will never do anything.