Dough thrives in a warm, draft-free environment. If your oven has a “proof” function, then use it. The “proof” function preheats the oven to 100 F degrees, causing a warm, but not hot environment for your dough to rise nicely. If your oven doesn’t have this “proof” function, I would still use the oven. What I usually do is preheat the oven to 200F degrees, or whatever the lowest setting is for it. Once it reaches that temperature, turn off the oven, then place the dough in there to rise. This will speed up the proofing process tremendously.