Powershell script to create a new Evernote note in a single command

nn.ps1

# This script will create a new note in evernote. Set options to configure

param(
    $note
)

# ---- OPTIONS ----

# Path to the Evernote executable. Not required if evernote is already on $PATH
$evernotePath="C:\Program Files (x86)\Evernote"
# Specify a notebook for new note. Leave blank for most recent notebook
$notebook=""
# Set max length of auto generated title
$maxTitleLength = 75


# Set a max length of the title
$title = $note.Substring(0,[Math]::Min($note.length,$maxTitleLength))

if($title.length -eq $maxTitleLength) {
    $title+="..."
}

if ($notebook) {
    echo "$note" | & "$evernotePath\ENScript.exe" createNote /i $title  /n $notebook
} else {
    echo "$note" | & "$evernotePath\ENScript.exe" createNote /i $title
}

How do you 'run' this script? I'm new to Powershell and just stumbled here, any tips?