[header] How to avoid conflict [title] Acknowledge the other person's concerns. [step] If she has instigated the fight, or has responded irrationally to your concerns, verbalize this. For example, say, " i realize this issue is really important to you, " or " i know you don't think my idea is any good, but i do. 
" [substeps] If the fight starts off heated or quickly escalates, remove yourself from the situation. Tell her that you need a break before returning to discuss the issues.