Keep all cleaning products and medicines either high up or locked away. When using these things around small children, try to do it whilst child is in a safe space away from you or being supervised by another adult. It's an obvious one but it really is easy to get complacent about.
Cut cords off blinds/curtains or buy the special safety ones if you can afford to. Also always watch out for stray items that are long and ropey around the house, which could easily choke when wrapped around. Things such as Dressing Gown belts, tape measures, fairy lights, ribbon, etc
Keep plastic bags in storage that's out of reach.
In the kitchen, remember to push back all dangerous objects that are currently in use (e.g. Knives, cutlery, scissors) away from the edge, as small children may reach up and try to grab and they maybe taller than you think! Same goes with pots, pans, mugs, glasses and anything hot of course. Try to use the back two rings on top of oven, if you can't then place child somewhere safe or with another adult whilst cooking. (I have a safety gate at the kitchen door so I can watch dd play whilst cooking.)
Use door guards (we just used the cheap foam ones, very effective) to prevent little children slamming doors onto their fingers around the house.
Put locks on bathroom doors high up if possible. Ours already had the handle locks meaning dd could easily lock herself in there. My plan if that were to ever happen is to use a knife on the other side to twist the lock back out. Check your locks and have a safety plan of what you'd do in this scenario.
Keep your jewellery box out of reach, it's full of chokeable or even sharp things but also very valuable things!
Also keep things like shaving razors locked away unless they are in current use, ie take it in the shower/bath with you then take it straight back and out of reach.