Someone asks whether they should accept a job, buy a particular item or move to another city. You may have useful experience. You also have incomplete information about their circumstances and cannot make the outcome belong to you.
Ask which part of the decision they want help with. Share the experience relevant to that part and explain its limits. A detail from your own situation may be useful without applying to every part of theirs.
Help them find the missing information
You can suggest a question to ask the employer or a cost to check before deciding. Keep the suggestion concrete enough that the person can investigate it. For decisions needing professional advice, help them identify the appropriate kind of adviser.
When they choose, avoid treating a different answer as a rejection of your help. You can remain interested without monitoring whether they follow your recommendation. If they return with another question, respond to the new circumstances rather than trying to prove the first advice was correct.
