It is a good habit to name your nodes as you create them, as it will make your life much easier when you have to look at them in editors such as hypergraph or hypershade. If you're not already doing this, I'm going to give you one more good reason, it makes them easy to select! In the upper right hand corner (at least on the default configuration) is a field box with a label to left. The label should read "Sel" if it doesn't, click the arrow next to it and switch to the quick selection mode. Then you can select an object any where in your scene by typing its name in the field. Quick select also supports the use of wildcards. Use quick select to pick your object then press "F" to frame it in view.

Note: If you keep this in the quick renaming mode while you're creating your objects and other nodes, it is a very handy way to rename them