Questions about insects eating flour and living in the cracks of a wooden cutting boards
This is a species of psocid (of the family Psocoptera, AKA booklice).


Species are best differentiated by their abdominal structure and antennae. Without a better (more magnified) image and info about the OP's location, identification to species is not possible. Though its small size will definitely narrow the options.
If I had to guess based on the limited detail (and my limited knowledge), I'd say it's a species in the genus Liposcelis or related genera.  See Oklahoma State's ENTOPLP ID key for examples and info. I've included 2 random images of Liposcelis species for reference: the (TOP) is Liposcelis brunnea and (BOTTOM) is Liposcelis corrodens.
You can find info about prevention and removal from Oklahoma state, King's College London or the Orkin man.
UPDATE: Though I, myself, cannot identify this psocid to species, according to this KCL article, Liposcelis bostrychophila is the most likely candidate. [See here for ID notes].

From the KCL article:

Liposcelis bostrychophila is the principal psocid pest species in the UK and in Europe. This single species, which is mainly an inhabitant of households, is responsible for virtually all of the psocid related complaints in the UK (Turner &amp; Ali 1996)...Recent estimates are that 30% of households contain this species.
Several other small (about 1mm long), flattened, wingless liposcelid species (eg. Liposcelis corrodens, L. pearmani and L. brunnea) can become quite common in industrial sites, particularly in the summer months but are uncommon in domestic premises.