Wow, what a difference, that looks great! It's such a good feeling isn't it?
Try to keep on top of it. Just spend a few minutes each day, keeping that area clear.
Apartment Therapy is a US site, but they have lots of articles on decluttering and organisation, and in January, they do a sweep, where they send an email every day, giving you a job to do for that day. Some jobs are decluttering, some are organising, some are just to go around with a pen and paper making lists of things that need doing, etc. They also have comments open below each day's job, where people chat about what they did, which is very motivational.
A pp mentioned Flylady, she's also good. She uses a timer, set for 15 minutes, when you do something for 15 minutes and then stop for a break. She also uses routines, like swish and swipe, where you give the toilet a swish, and run a cloth around the sink every day, and clearing hotspots (those flat surfaces that things get dumped on). This stops the dirt and clutter building up. Not going to bed with dirty dishes in the sink, and the sink wiped round, etc. She says it didn't take the mess a day to get there, so don't expect to clear it all in one day, take baby steps.
As you walk straight into the kitchen, you need a landing strip. Somewhere to put keys, the post, possibly shoes, coats and bags if they get dumped there, so they don't clutter up the worktops and the floor. Apartment Therapy have articles on the landing strip.
You've started well, just keep it up! It's amazing how different it feels coming downstairs in the morning and being greeted by a tidy kitchen.