things to remember

when a friend gives you $10, no one claims it on their tax return.
when a friend gives you a coffee or a sandwich, no one claims it on their tax return.

point being, dont sweat the small stuff.

as for purchasing large products. (over $600 threshold) then read the IRS details about how to log it. or go speak to an accountant. i have read many threads where people are going nuts worrying about logging the little things like buying a starbucks coffee, which i find very amusing whilst face palming them

oh and another point. you dont pay tax until the point you have FIAT in your hand. so dont think that if bitcoin rose from $450 to $470 in one day that you need to send a payment to IRS at every price movement, simply because your holding coin instead of spending..
point being... its not a gain or loss until its FIAT!!