A good miniatures paint job can be ruined by bad basing; on the other hand, a miniature with an average paint job can really be enhanced by an inspired base. Here’s some advice on making scenic bases for your miniatures.
basing
Printing and Basing Paper Soldiers
Matt Fritz has some advice on printing and basing paper soldiers for your miniatures wargames.
Basing Starship Models
Star Ranger has this advice for basing your starship models. There are lessons to be learned here for players of Battlefleet Gothic, Full Thrust, Star Fleet battles, and other science fiction miniature wargames.
Old School Warhammer Fantasy Basing Tutorial
Realm of Chaos has a tutorial on basing using techniques I gleaned from back in the 1980s when I first started playing Warhammer Fantasy.
Advice on Basing Your Figures
Legio Wargames has a tutorial on basing your figures with wood filler, sand and other bits.