Police in Bolsover have given out more than 1,000 leaflets reminding homeowners to be security conscious.
Officers left leaflets at homes they spotted with windows left open and valuables on display.
Property marking kits were also handed out and officers spoke to around 40 motorists who had left items on display in their cars.
Last month 20 vehicles were broken in Bolsover - three of which had been left unlocked and 17 of which had valuables on display.
PCSO Ben Perry said: “Very few thefts from vehicles happen where nothing has been left on show, so don’t leave valuables visible in your vehicle and, if at all possible, don’t leave them in there at all.
“Your home is also much less likely to be broken into if it is secure and items are not left in view of prying eyes.”