Ewan is now walking! How to Baby proof?

Ewan is now officially walking - not just a couple of steps, but actually crossing the room! So I guess that means that I should start some sort of baby proofing. This is where I need your help. After looking online for baby proofing items, I have found that there are thousands of items available! I am assuming that the majority of these items are not necessities and simply a marketing ploy to make more money off of toddlers.  I have three baby gates, one for the top and the bottom of the stairs as well as to block a single step going to the dropped laundry room. The heavy furniture in Ewan's room and play room have also been secured to the walls to avoid any tipping. As well, I have plugs for each of the electrical outlets. What else do I really need?

Ewan has not shown any interest in cupboards as of yet - will he eventually? Are all of those latches really necessities?

Please let me know what you feel were your most important baby proofing items. Thank you!