Is there a particular place where you meditate or commune with the
others? I leave offerings at the places where I meditate. Offerings for me are dependent on
who and
where I am meditating or what's going on and what help I've asked for or what I'm expressing my gratitude over.
For example, when I'm out at a bonfire with friends sharing food. I'll place a small plate of whatever I'm eating nearby so my bounty is shared because I'm expressing my gratitude for that time, place and company I'm with that evening. Whenever I eat I always leave a little offering outside. When I'm at home it I usually put a small amount of whatever I'm eating on a plate and leave it on the front porch because I want the spirits to know they are as welcome to my home as the people who visit me.
One of the places I like to go to meditate is full of the spirits of children (it is near an old Indian boarding school and in the area where many of them were buried - including at least one of my relatives) so I leave candy, pin wheels, coloring books or small toys.
For big things, and this is due to my upbringing, I use prayer cloths. I'll carry a piece of material, usually cotton, when I'm asking the spirits for help. I carry the cloth with me at all times and "talk" into it - expressing my concerns, wishes for others that may or may not be affected, ask for help or whatever else is going on. During this time I also collect small items that are related to whatever is going on in my own life and/or remind me of the person/problem I'm seeking help for at that time. When I'm ready to leave the offering I tear the cloth into four pieces, then I take the items I've gathered and place a few of them in the center of each cloth. I usually use jute or something natural to tie the items in the cloth such that they look like little ghosts and then tie each of the four prayer cloths onto trees or branches near where I usually go to find mental clarity and ask for help. As the cloths disinigrate everything I've put into to thm released - my hopes, my fears, my anxieties, my acceptance of things that need to be, my tears, my laughter - it is all released.
Last time I did this it was on behalf of some health and money problems that my sister was having. She was hit by a car, left for dead and is now permanently disabled and has brain damage. She's had several surgeries to repair both her body and her face. For her, I picked up some beer bottle caps I found while out walking my dogs (she was out drinking the night she got hit), some small rocks (for the gravel road she was left on), some chicken bones (drumsticks because she has "chicken legs" and she was undergoing surgery on her legs), coins from the year she born, from the year she was hit and from the current year (for money reasons and for the metal bars in her legs), some Indian tobacco (made of tobacco, sumac and tallow) and a few other items like a small pieces of food she likes, earrings she gave me and the like.
I only mention this because if you've been asking for help over a period of time you need to give back over a period of time. As you go to a special place to contemplate your problems you build up its energy. Too often we take from a place and don't give back enough and so we drain off more good energy than we replace. You should make it a point to go to your special place when things are good and share your thoughts and energy. I don't know your situation but if you've wandered around your property asking for help than you might do well leave offerings at the corners of your property so you encompass the entire area where you've asked for help.
On edit: if you have a special place you might also want to put up a "Green Man" and/or some "Tinner's Hares". They are both ancient symbols and, to me, help honor the connections between man and nature.
The Three Hares
Two "Green Man" images.