ive tried the following in the past and like and dislike each for certain reasons, not that i would remember them now but they are all suitable, its really preference...
i can use a synth under the kick to give me some low end emphasis with a snap or click, whatever you call it... both samples will need to be eq'd .
i can use parallel processing, and give the paralleled track a different setting vs the original, ie dynamics, eq, volume, ... again will have to eq it thru the bass.
i can use a single sample, and eq it, add some effect of my liking, compress it, (maximize/limit) it depending on the style of music... always a need to eq it to fit thru the bassline.
what ever way ive used, ive noticed a trend heavy on eq settings... and volume. more so than using effects to make it loud, or punchy, but to give it tone or essence/presence.
i dont know how they make kicks for dubstep, for example... but id imagine, they would be using some effects, and probably limiters/maximizers. subtle effects like reverb or saturation can add surrounding to the kick, experiment as suggested previously.
TBH tho i am only so fond of reasons eq... i wish it was more flexible and could modify the slopes more, steep, unnatural slopes, i mean. i am referring to the mixer eq btw.