Not so good —You should ...
不要说：你应该……

Each person has her own unique path of grief to follow so it isn't helpful or comforting to make suggestions as to how she should grieve or suggest that she do certain activities to help her feel better.
每个人有着自己处理痛苦的办法，所以不要给她意见，不要告诉她如何哀悼或应该去做些什么减轻痛苦，这毫无用处。

Better—Do what you need to do to grieve—I'll support you however I can.
不如说：用你自己的方式去哀悼，我会尽我所能支持你。