I'm having a hard time organising and especially switching tasks and getting meaningful work done when multiple things that are unrelated fall together. Having

I'm having a hard time organising and especially switching tasks and getting meaningful work done when multiple things that are unrelated fall together. Having a single thing do to and beeing able to just leave work would be great but at the moment I'm freelancing and having multiple jobs and doing sysadmin-style work, learning theory and programming in a new language really just kills me and I'm not getting much done. Once I get traction in a certain task it's okay but the constant switching is killing me.