Fees reduce the return you earn. Check the fees you pay on your bank and investment accounts. If you need to keep a minimum balance on your savings account make sure you do or you may have to start paying a monthly fee. If you struggle to keep the mininum amount consider changing to a no minimum balance, no fee savings account.
Check if your investment account requires a minimum number of transactions in a set period. This can be as high as $100 every 6 months. You will be charged for the transactions, but it will be less than than $100.