Garlic helps loosen things up and may provide some antiviral and antibacterial effects as well. In fact, in Latin cultures where there is heavy use of cayenne and other hot peppers, bronchitis is rare because of this effect. Teas and herbal teas can also be good. Green tea is mild and has more health benefits than black tea. Grated fresh ginger makes a savory tea.
Extra rest can help.
This is particularly important if you became sick when you were already extra tired or run down. If you can't stay home or even stay in bed extra in the morning, try to go to bed an hour early if you can. And, if you can stay home for even one or two days during the more intense early sickness, it can help you recover faster. And antibiotics DO help with those. If you have such an infection, an antibiotic can help you begin to recover within a couple of days when you might have stayed sick much longer otherwise.