UnixGuy wrote: » If you don't use it you lose it! You don't have to be a walking wikipedia, that's what Google for. Best way to retain information and build on it is to actually use it on the job. If you don't have such opportunity at work, change jobs, if you can't, LAB! Don't aim to just retain what you learned, but aim to build on top of it, and use it so much that it becomes a second nature.