It is always nice to keep your profile up to date, this is why I think it is also important to point out to your members that they have one.

Learn them how to go to the link, where to find it and how to change the data it displays in private/ public.

Keep the usertitle fresh, just like the avatar and profile picture.
Point them out there might be custom profile fields.
Ask them to keep their signature up to date and within the forum rules.

There are enough options and settings to make each user profile unique.

Oh btw .. we have a few custom profile fields. Go check it out :)

thanks floris for this one

I liked the mod 'incomplete Profile field'. It would display the incomplete profile fields to members on top of the board. once they fill-in the complete information, it will not display.