Are you are able to just sit, for 1 hour, 2 hours, maybe even 6 hours? If not, why? Is it because of your thoughts? Let go of the thoughts. Is it because of something you have to do? Let go of it. If you are unable to let go of these things, why? 1. Is your attention seemingly drifting outside your awareness, back to thoughts, back to things you have to do? Focus your attention on an object (the breath counts). 2. Does your physical body hurt when sitting for that long? Learn to sit better (fix your posture, fix your seat, fix your legs, fix your breathing). Does it still hurt? Take a break; rest is important. 3. Are your thoughts sticky and associated with unresolved emotions, problems, scenarios? Fix the source, either by solving the problem or planning how you will pursue solving the problem, or drop it, give it up. To give it up, when the thoughts arise, tell yourself that whatever happens, you will be ok. Here you go, I just derived meditation for you.