Depends on what you mean by "stocking." A Betta and a few shrimp? A sorority?
Assuming that you got your seeded water and decor from a established cycled tank, you've put nitrifying bacteria into your 10g. It's better to use filter media or gravel to seed the new tank. Water contains very little bacteria. Now you'll want to feed it ammonia in order for it to grow.
In any case, a fish is as good an ammonia source as any at this point (and better than fishfood, imo). But you have to keep a close eye on your ammonia (for the safety of your fish) and on your nitrite (to assure that your cycle is progressing) and on your nitrate (to know when your cycle is done).
This requires a liquid freshwater test kit. The most common one is by API. They're available from Amazon for <$20: This is an essential item for safe fish husbandry, right up there with conditioner or thermometers.
[ame="http://www.amazon.com/API-Freshwater-Master-Test-Kit/dp/B000255NCI/ref=sr_1_1?ie=UTF8&qid=1348802207&sr=8-1&keywords=API+test+kit"]Amazon.com: API Freshwater Master Test Kit: Pet Supplies[/ame]
Buy a bottle of Prime or a thermometer and get free shipping.
You can set-up the tank complete with plants and decor. As long as you do enough water changes to keep the ammonia (and eventually nitrite) below 0.25ppm, your fish will be safe. Keeping the temperature on the warm side and aerating with an airstone or sponge filter will help speed-up the cycle.
Stock slowly. You'll be fine.