There are many ways to indicate that something is prepared or available for use. Phrases like "good to go," "set to," and "up for grabs" are all colloquial expressions that convey readiness. Other synonyms include "prepared," "organized," "completed," "set up," and "arranged." In a more formal context, one might use phrases like "ready and waiting," "primed," or "at the ready." Another option is to use verbs like "readied," "prepares," or "made available," all of which convey that something has been made ready for use. Whatever your preference, there are plenty of synonyms to choose from when describing something that is ready for action.