I didn't answer your poll since it specifies 5E and we still play 3.5, but we generally use a combination of Paizo Flip-Maps and Map Packs, D&D Dungeon Tiles, and homemade maps/tiles - the maps are usually on the backs of desk calendar sheets gridded off with a yardstick and the tiles made of either paper or cardboard. For broad, open areas it's usually a calendar sheet map; for building interiors and the like, each room often gets its own tile and is plunked into place only as the PCs reach it.
If the adventure warrants it, I'll sometimes make 3D models out of poster board, cardboard, or cardstock.
PCs are always painted miniatures. Monsters are frequently appropriate miniatures, occasionally miniatures of something at least similar, and as a last resort homemade stand-up tokens using artwork found on the internet.
Johnathan