Keeping your body hydrated with plenty of water can help keep your sinuses from clogging and help to clear up blocked sinuses.
Also running a humidifier in your home especially where you spend a lot of time can help unblock your sinuses and help your sinuses drain.
Another thing you can do is to take a steamy hot shower with as hot of water as you can stand or even just run the shower on steamy hot so it steams up the bathroom and you can just sit in the steamy bathroom which can help your sinuses drain.
Irrigating your Nasal Passages with a saline solution and A Neti Pot and eating some warm chicken soup also helps with sinus trouble.