Every writer experiences writers' block at some point. I think that this is especially true when it comes to high volume onlne article writing where you have to come up with new ideas to write about every day. Here are some of my own personal tips for avoiding this phenomenon as much as possible and overcoming it when it does crop up.
1. When you do come up with ideas always make a note of them if you aren't going to start work on the article immediately. It is often the case that when ideas do come you get more than one, or you have an idea but it doesn't seem quite right for some reason and you don't start writing. Making a note of all these ideas to come back to during those times when the inspiration isn't flowing can really help.
2. Look back over your previous work if you are really struggling. Often old articles will inspire a new idea on a similar topic, or perhaps an old article has become outdated and you can create a new one with the most up-to-date information.
3. Read more! Especially read articles on the site you want to contribute to. Seeing what other people are writing and perhaps more importantly seeing what readers are enjoying the most can really help.
That's it, I hope these tips help and good luck finding our muse!