Martins Lasmanis and his family.Courtesy of Martins LasmanisMartins Lasmanis, the founder of Supliful, struggles with balancing startup growth and family time.Supliful quickly gained traction, and Lasmanis began working 16-hour days with three young kids.He now schedules family time and delegates work to manage 'dad guilt' and improve work-life balance.My youngest son turned 3 this year — the same age as my startup, Supliful.