I'm coming down with the flu I think. Tired, feel hot, achy, etc. Is there anything I can do to reduce the severity of the symptoms to come?

Diagnose it to treat. The best thing to do is get an accurate diagnosis - so then you can get the best treatment. Even though it's no longer 'flu season' in the US, it's still possible to get the flu. Best to see a doc today (urgent care?) and get a rapid test. If it is flu, there are antivirals available (Tamiflu). It could be another germ however, so finding out what it is will help plan out the best treatment.