If you don’t know how someone feels, let them know that you haven’t been there before, but you’ll try to put yourself in their shoes to help as best you can. 
Also, don’t be afraid to let them know you don’t have anything to say. You can still be an ear, take some time to think about it, and then share your thoughts later.

Be honest

Plan a fun weekend getaway or day trip with your friend. Set the date in stone and make an unforgettable memory. People often find answers for themselves when they get away, let themselves relax, and clear their head for a while.

Make plans

Even if you’ve been there before, you can’t guarantee any specific outcome. Your friend could approach her boss exactly like you did for a raise and end up being demoted—at which point she might blame you.
Keep expectations realistic by focusing on possibilities within the realm of uncertainty. Weigh the possible outcomes, both positive and negative.

Don’t make promises

If you feel the need to offer unsolicited advice, ask them, “Do you want some ideas to improve the situation?” This way they have the option to say no, and they’ll likely give you more attention when they’ve agreed to take your help.
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Advise with permission

The best way to be a friend is to allow them to tell the story repeatedly. Then they need to work through it and let it go. Tell them you’re there to listen to everything they need to say. Once they’ve gotten all out, you’d love to help them move on.

Give them a rant window

When someone comes to you for help, they’re trusting you to hear them out without being judgmental or condescending.
Focus on what they can do or change right now. Try something like, “It might help to consider….” 
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Avoid judging

It can feel gratifying to figure out what seems like the answer and then deliver it in a sermon. It can come off as superiority. Instead, try, “I don’t have all the answers, but I’d love to help you figure out what’s right for you.” Whenever you’ve talked for a few minutes, bring it back to them. “What are your thoughts about that?”

Make it a collaboration

When you make the proactive decision to find answers for yourself, you feel both empowered and confident in your ability to make the right decision. You can help your friend feel that way by pointing him in the direction of a few books that will help him help himself. Start by saying, “I came across something that might help put things in perspective…”

Recommend a read

Be there with kindness instead of words. This is a good approach if you’ve already offered advice on the problem, and realize not much you say will help.
Leave a hand-written “thinking of you” card in that person’s mailbox or mail them a package with some sweet treats and light reads.

Say it from the heart

Your friend doesn’t just want tips to switch careers; she wants support in making a scary but positive change.
It doesn’t matter so much that you have all the answers. More often than not, people know what’s right for them; they just want to feel validated and supported.
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Offer long-term support

"If you propose to speak, always ask yourself, is it true, is it necessary, is it kind." ~Buddha Nothing appears to be going right. The worst part? No one gets it, even though they might claim to. Even though you know this is all temporary-it always is-you feel the need to ask other people what you should do.