How to improve power supply on a switch?

[elan120]

When it comes to linear power supply in the 5V/1A range, the choices are many, it really depend on what your budget is and how good the quality you want to get.

 

As far as your other question :

50 minutes ago, Vangelis said:

With something like a switch do I have to pay attention to watts?

The formula to calculate the power, which is measure in watts, is "P = V x I", so when looking at the 5V/1A spec, wattage is 5(V) x 1(A) = 5W(atts).