Well, I'll make one general suggestion for advisers:
Know thy advisee.
For example, if you know that the person will be put off with wording as blunt as "get over it," stay away from that wording-even if they need that kind of advice. Rather, rephrase this so that you're giving this advice in a less harsh way, as in "I realize that this is hurting you, but I think the best way to handle it is to try something else/change jobs/look forward/etc."
Of course, if you know that the person will appreciate really blunt, in-your-face advice, that's another story.