There are a few different ways you could go. When you say cart, I'm assuming you mean cartridges stuffed with batting material that will hold just a few drops. If that's the case, you could try cartomizers. If your 510 is a slim battery (cigarette size), low resistance cartomizers will harm your battery, but standard resistance cartomizers are fine. 3.0 ohm Boge cartomizers are decent and will hold approximately 20 drops of juice. 80/20 PG/VG works best in cartomizers, in my experience.
Another option is the standard resistance 510 tank atomizer. The juice is dripped into a filler-less tank cartridge that holds approximately 0.9 mls. A spike in the atomizer pierces the cap of the cartridge and wicks juice to the coil. A separate chamber in the cartridge provides a pathway for airflow and vapor when you draw on it.
You could use a cartomizer tank with a standard resistance carto on a slim 510 battery, but carto tanks are better suited to larger batteries such as eGo, kGo, Riva, etc., or various battery mods. Also, larger battery devices and mods open the door to using low resistance atomizers and cartomizers.
Another option is a bottom feeding mod. Bottom feeding mods offer the advantages of greater battery life and much greater juice capacity. You get to spend more time vaping between swapping and recharging batteries and refilling the juice bottle. One of ECF's own modder/supplier's is currently selling 3.7 volt bottom feeding mods for $25.00 each. They require separate batteries and a charger, but if you want to give a bottom feeding mod a try, it's a relatively inexpensive option. Details can be found in
this thread.