Subscribe to a good publication to learn about all this stuff...
There are many magazines, where bit by bit you can learn.
Child care expenses could be partially deductible, same goes for education and medical expenses. Home equity loans interest is deductible. 529 plan contributions for child'e education are deductable from state (?) taxes ( ?I think this is how it is). Take all worn clothes into Goodwill or the like place, you can price each bag at $250. Most memberships at museums, many local organizations are partially deductible. If you have a hobby, for 3 years you can write off many expenses ( I could be wrong at this, never done it myself).
And so it goes.....every penny counts:-D

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Happy New Year to all! Virtual hugs!