Hi Jack,
You can create your own toolbar buttons:
http://docs.mcneel.com/rhino/5/help/en-us/index.htm#toolbarsandmenus/toolbar_button_editor.htm
On that button you can set a macro for the command RunPythonScript like so:
_-RunPythonScript
(
your python script here
)
for example:
_-RunPythonScript
(
import rhinoscriptsyntax as rs
def MakeAPoint():
rs.AddPoint(0.5,0.5,0.5)
MakeAPoint()
)
In the button editor it looks like this:

HTH
-Willem