Would you

Knowledge is something that is always better if shared. If someone is trying to get something out of you and if it might profit him then what is the harm.
I think its in Business if you tend to be a miser in anyway, it get backs to you. So it is better that you share what you know and next time when you need help, you might have someone helping you with a good advice.

You have to give some thought to how you ask for help, whom and when.

What follows is just a reminder of what everyone knows ... however, I think reminders can sometimes be useful.

Many people will be happily give (a little) help to anyone who's done what they can to answer their own questions and now just needs some specific advice to take the next step forward. They won't help if they can't work out what you're asking, suspect there's a hidden agenda or feel you're expecting too much support as a "freebie".

People like to be thanked for their efforts - those who remember this often get the bonus of receiving additional help!

They also prefer to help those who've established their right to support by being generous helpers themselves.

I will now stop teaching my grandmothers how to suck eggs and get on with the recycling

Sometimes, you can't help thinking that the information or help you give to someone isn't appreciated, and it can make people think twice about helping others. Sometimes I think that regardless of whether they listen to you immediately, they will in the long run, if things don't work out the way they planned, etc.

For me, its just an awesome reward knowing my skill can help someone. For example, last night. I was working on an art piece, and even though my eldest daughter has seen me remove grass from the skirts / dresses of my models when moving them to other backgrounds, it was as if she saw what I was doing for the first time. It felt good knowing that she thinks its an awesome trick, and that she wants to learn how to do it, so teaching her to would be a pleasure for me.

If I knew that someone was doing that just to make me feel better or just trying to make conversation, or they didn't really want to learn, I probably wouldn't have shown them.