Creatures by CMC (including spells that act like creatures), then non-Creatures, then lands.

As a personal preference, I sort within CMC by ‘ease of casting in this particular deck.’ So if I’m playing Junk in Legacy, for instance, and its mostly black, then green, with a splash of white it might look like…

4 Deathrite Shaman
4 Dark Confidant
4 Tarmogoyf
4 Stoneforge
2 Lingering Souls
3 Knight of the Reliquary

4 Thoughtseize
4 StP
4 Hymn to Tourach
1 Sylvan Library

When I get to lands, another personal preference, I just go Duals, Fetches, Basics, other stuff, again in order of important to the deck. So…

2 Bayou
2 Scrubland
1 Savannah
9 Fetches
3 Basics
4 Wasteland
X Spicey lands

Even with lands that act like spells or creatures (Maze, Tabernacle, Dark Depths), I’ll sort them with lands.

It frustrates me to no end when I see purely random lists. I’ll read an article, and I’m trying to put a curve together in my head, or count turn 1 plays, and see Vindicate followed by Deathrite, followed by a Fetch Land, followed by Thoughtseize… and just think, ‘How much effort would have been required to make this readable?’ ><

for standard: lands, creatures by mana cost, planeswalkers by mana cost, spells (removal->other, by cmc).
for Legacy, mana sources (lands and rocks), cantrips, business spells/threats, permission/disruption. Generally if there’s an engine of some kind, I list them grouped together in the appropriate sections, otherwise, I just go by cmc usually. When I register my lands list, I separate out the mana producers from the business and utility lands, the engines go in their own category, and the other business spells go in a separate section.