https://bitcointalksearch.org/topic/coinjoin-bitcoin-privacy-for-the-real-world-279249
You may also look at first thread where he explained about it.
https://bitcointalksearch.org/topic/i-taint-rich-raw-txn-fun-and-disrupting-taint-analysis-51kbtc-linked-139581
You can't take advantage of this unless a few other people's UTXOs are used in the transaction or you will have to use a few different addresses of yours. Remember, this may result in address linking[1]. Also the outputs of the transaction should be identical, i.e. same amount.
Edit: [1] This isn't always true but people(incl. me) assume if UTXOs of two addresses are used in one transaction, they are owned by one person.
