As you can see, on any map, there's the name of the game, and as full a name of the area as possible. Whenever known, the in-game name of the area is preferred. Be sure of spelling and punctuation, mind your sequel numbers (are they "2"s and "3"s, or are they "II"s and "III"s?), and remember the subtitles. I hate spaces and underscores. Don't send me "FF7" maps when you should be sending in "FinalFantasyVII" maps, etc. If maps are sequential, but don't actually have numbers, you can sneak a number in the filename, before the area name would be best, making it clear to me that they shouldn't be part of the actual filename when they're put up.
Most people are pretty good about all this. Even if they don't name the files exactly, at least there's some logic behind the filenames. I'm not a total idiot, so I can figure it out.
You'd be surprised, though...sometimes someone will send in multiple maps from different games without saying what they are, and the maps have non-descriptive filenames and they're of games I can't readily identify. Just a random hodgepodge of maps. And I'm supposed to figure these out without a clue? Often I'd rather people treat me like a total idiot, it'd be easier if I didn't have to rename files. Sometimes, renaming can be a large part of what holds up putting up maps.