These giving guideliness that I've drawn up from my study of the Bible and my own experiences are offered here in case you are looking for some to start with in your life. Feel free to adapt or improve on them.
This applies when giving to people in need. Sometimes there are people who have a greater salary than I, but they are doing a great work, and need financial help to do it. That's a different situation.
Here I mean, discretely, without embarrassing them. I do not mean, giving because they 'expect it' or just to please others.
If you love to see souls saved, give to evangelism efforts. If you want to see people have the dignity of employment or their own business, give to micro enterprise ventures. Choose your giving destinations according to the results you most want to see.
The Bible compares giving to sowing seed, and promises that God will provide resources for your giving. That is wonderfully encouraging!
If you are looking for a plan to start giving use the one Paul suggested in 1 Corinthians 16:2. A percentage of gross income works for me.
Peter and John had no money, but they gave the lame man at the gate the ability to walk!
(I'll add more as I come to learn them).