Need Input

[Khig177_imp]

I need to install a power outlet so I can power my phone as a GPS unit.
I also have a set of driving lights I will probably install at some point. Not sure if I need a direct wire or use a relay. Also considering a baterry tender in the future. I have never installed any accessories in the past. My goal is to install a set up so Ii can add accessories in the future and not have to redo the entire ste up. I have looked at powerlet accessories ($$$$, I have investigated adding a small fuseblock with a relay.

looking for some pros and cons of the systems anyone has used in the past that would be easily expandable as needs arise.