Items I will take care of for you:

Accounts Receivable (A/R) aka tracking income

Accounts Payable (A/P) aka paying bills

General Ledger

Reports

Budgets (monthly, yearly, per project, etc.)

Account Reconciliation (balancing checkbooks, bank accounts, credit card accounts)

Work with your accountant to provide reports for your tax return

Create a spreadsheet to compile your important account information all in one place

Organize and file receipts and documents

I use QuickBooks Desktop (PC or Mac), QuickBooks Online, Express Accounts, and Excel (or OpenOffice or Google Docs) spreadsheet