The phrase "On a separate note" is a correct and usable phrase in written English.
It can be used to indicate a change of topic in a discussion or to introduce a different opinion or point of view. For example: On a separate note, I think it would be a good idea to look into other options for this project.
On a separate note, the police in High Point, for all their success in fighting crime, conformed to at least one stereotype.
On a separate note, for a number of reasons I'm not at all happy about the new "Left Twix, Right Twix" advert, but this might have to wait for another day.
On a separate note, I've been using the Flickr Uploader recently to upload photos.
On a separate note, in addition to serine, threonine and tyrosine, phosphorylation also occurs on other residues such as histidine.
On a separate note, the threshold depends on the noise power, which, as we explain in Section 3.3, is unknown for every received frame and thus must be estimated.
On a separate note, Altman also told me the next version of Loopt's app will include e-commerce within the app, thanks to Apple's recent allowance for in-app commerce for free apps.
Our little one had a separate note for Santa on top of her wish list.
These are moved to a separate notes section.
In a separate note to investors on Friday, Pershing Square said Herbalife was trying "to spin the settlement remarkably as somehow an endorsement of their business model" and that over the long haul the outcome would be "materially positive for our short position".
In a separate note previewing the JPMorgan conference on Tuesday, Mr. Mayo engages in a bit of managerial spit-balling.
On an entirely separate note, a reader justly asked, in reference to a phrase in one of my posts: "Does anyone flying domestically sup in the sky?" It's a good question, given the way most airlines have eliminated anything more than a stale sandwich in a cardboard box for passengers flying coach for anything under about six hours.
