Always..I repeat, always recruit with a private tell to the person of interest using the player finder. I have pretty much recruited my entire fc myself with this method. Players may not always reply and lots will decline, but many will be thankful for the invite request and not a blind invite.
Always have an short, polite intro from yourself and your fc.
Lastly, use proper english and be well spoken. No one likes bad spelling and grammar when getting a tell from a total stranger.
Good luck with your new fc!