fix: sidebar width / grid border / featured slider images are massive

my site: http://mindfulhellos.co/ I can't seem to fix these issues. please help! thank you. featured grid: There's a thick white border around my featured grid, on the home page. the images are the recommended dimensions featured slider: images are so massive, but they are the sized to the recommended dimensions so... are there are any other options to making these a bit smaller in height? sidebar: i think this problem just started occurring, i dont recall it ever being like this. the sidebar is set about an inch away from the where it normally is, and is showing up "squished" and thin. thanks for your help! sami