improving
This is called a plateau and happens to everyone. If you're stumped, you might consider some kind of check-up of your play. Good luck.
Your Tactics Trainer rating is under 1000. Might I suggest that improving there would be a logical place to start?
Don't worry adds68 most chess players play for a year or two and then reach a level usually somewhere between 900 - 1500 grading that they find hard to progress from. The only real solution is to keep practising and listen to the advice of stronger players. When a plateau is reached it can take either time, hard work, a different approach or all three. I find a mixture of playing and book learning is a combination which helps me improve the only downside is I don't always have the time to do all this. Face to face instruction if available is probably best however individual tuition is expensive. Your local chess club would be able to help as there would be an endless stream of advice and people you could bounce ideas off. As you are an Elderslie punter like me why don't you get yourself down Paisley Chess Club and see if playing and talking with other players directly helps you improve. I can assure you we have players of all standards from people who ask which way round the King and Queen go to experts. We are a friendly down to earth bunch and everyone is made to feel welcome. www.paisleychessclub.org.uk
I have been getting a lot out of reviewing my losses to help guide where I need to improve. If you don't already do so - that might give you some new areas to look. I've also started reviewing annotated games a lot more, which has been much more beneficial than I thought it would and I had never realy put much emphasis on that. I'm referring to books like Chernev's logical chess move by move.
Finally, your "thought process" is something that is rarely covered in chess material but plays a major role in your playing level. When you refer to some people get it and some don't, I think this is really at the heart of yoru thought process. Some people naturally look at a chess position and analyze it better than others. However, that doesn't mean you can't improve your thought process.
Hope that helps - good luck!