to start working seriously on something important
начать серьезно работать над чем-то важным (nachat' ser'yezno rabotat' nad chem-to vazhnym)
"I have to buckle down on my thesis this weekend."
"Мне нужно buckle down on свою диссертацию на этих выходных." (mne nuzhno buckle down on svoyu dissertatsiyu na etikh vykhodnykh)
to find balance and emotional calm within yourself
to start or continue doing something
to increase by a certain amount or percentage
to focus attention on your inner feelings or thoughts
to begin working with the intention of achieving something
to study or get information about something by reading
