Should I keep my achievements to myself?
Everybody needs at least a few good personal allies to celebrate with---your advisor is hopefully one of those, and some of your close personal friends are likely to be as well.

Your peers in a graduate program, however, are likely to be in a more complex place emotionally. It's also easy to cross the line between sharing and bragging, and easy to come across as condescending (especially regarding "routine" tasks like preparing a manuscript or responding to reviewers).

Don't feel guilty about success, and don't hide your achievements.  But I would also recommend holding back and waiting for your peers to ask you before sharing your news or offering to help.