On a day-to-day basis, you can save yourself a few clicks by using Contributions > Find Contributions. Also, instead of Editing the contribution and updating the status, you would be better off using "Record Payment" by clicking on the black arrow to the left of the contribution amount:
On a similar note, when you have multiple contributions to update, ...
I would create a new Financial Account and Payment Instrument called 'Work Trade'. And use 'Work Trade' payment instrument to record $200. And while exporting accounts you can handle 'Work Trade' accounts separately.