One thing I do is to periodically check on the highest-rated games on F95.
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Just click on the Filters drop-down and select Sort by: Rating - other selection criteria can also be selected.
It's not infallible, but if a game is highly rated I feel the need to at least check it out. I have recently found a couple of games that I decided to support financially that way.
But damn, you're right, the amount of games that I would like to check out is exceeding my ability to do so properly. I can't check out everything and still actually play a few.