I limited my only profitable periods by tracking them yearly. Week #3 CFB and NFL....thru about Week 13 respectively.....AND.....First week in Jan thru last week in Feb in CBB. No tourneys.
Any other period........complete losses. NBA, MLB, NHL......No chance.
An occasional MMA bet........besides that......my forte is limited to the first sentence.
My message: Find your strengths.....Stick to them! Don't bet everything.