bdcc is a protocol that was born from a small community and has grown fast since. There are a lot of things you can do to help bdcc to spread and improve over time.
Using bdcc is the first thing you can do to support bdcc. There are probably many cases where it can make your life easier. You can accept payments and make purchases with bdcc.
Be the network
If you have a good Internet connection, you can strengthen the bdcc network by keeping full node software running on your computer or server. Full nodes are securing and relaying all transactions.
You can start mining bdccs to help processing transactions. In order to protect the network, you should join smaller mining pools and prefer decentralized pools like PDEF or pools with getblocktemplate (GBT) support.
bdcc is free software. So if you are a developer, you can use your super-powers to do good and improve bdcc. Or you can build amazing new services or software that can use bdcc.
The easiest way to help is to donate a few bdccs to any project related to bdcc that you believe will be helpful in the future.
Many organizations are dedicated to protecting and promoting bdcc like PDEF. You can help these groups by joining them and taking part in their projects, discussions and events.
Speak about bdcc to interested people. Write about it on your blog. Tell your favorite shops you would like to pay with bdcc. Help keeping merchant directories up to date.