I don't get much free time and am usually tired out from the day, but when I do it's by:

• Concentrating on doing one at a time for a few days, to make some progress rather than flitting between them too quickly. Minimise context switching, I suppose.

• Planning ahead; allocate time, even if it doesn't seem like much.

• Making a tangible goal for each session.

• Not beating yourself up if something else comes up.