A person can give significantly by giving smaller amounts at higher frequencies. Weekly, semi-monthly, or monthly giving allows large gifts to be reached in smaller steps.
Sale of major assets, such as a house, car, land or business provides available income for giving.
Freeing up funds that are currently going to other areas of spending allows a person to increast giving to God's work. Diverting funds from entertainment, dining out, dues, subscriptions, utilities, offer lifestyle adjustments which impact one's giving.
Savings for special projects, retirement or a "rainy-day" may offer a resource for increased giving. Often we realize that a portion of our savings may safely be given to the work of God's Kingdom through our church.
The delaying of purchases allows a person to significantly increase giving. The acquisition of major items such as automobiles, clothing, or trips, when postponed, allows substantial giving opportunities.
Transferring ownership of an asset, rather than selling the asset and giving the cash. These gifts-in-kind may offer certain tax benefits by the giver.
Disclaimer: No decisions regarding giving should be made without consulting your tax professional.