1) Consider getting an assessment for ADD / ADHD / etc.
2) Stop drinking caffeine for at least a week, see if that makes any difference.
3) Sort out sleep - do a web search for "Sleep Hygiene" and see if that helps. (Do you snore? Do you have sleep apnea? Get that checked, it can be dangerous. But if you don't, well, lack of sleep affects concentration.)
4) Learn a good note taking system. People seem to like the "Cornell notes" method. There are many templates around. This means you'll be concentrating on what's being spoken, and writing stuff down in a useful way, and not distracting yourself with other stuff.
4a) Take notes on paper, not on computer, unless you really need computer. Avoiding computers means you avoid solitaire / facebook status checking / HN / etc.
2) Stop drinking caffeine for at least a week, see if that makes any difference.
3) Sort out sleep - do a web search for "Sleep Hygiene" and see if that helps. (Do you snore? Do you have sleep apnea? Get that checked, it can be dangerous. But if you don't, well, lack of sleep affects concentration.)
4) Learn a good note taking system. People seem to like the "Cornell notes" method. There are many templates around. This means you'll be concentrating on what's being spoken, and writing stuff down in a useful way, and not distracting yourself with other stuff.
4a) Take notes on paper, not on computer, unless you really need computer. Avoiding computers means you avoid solitaire / facebook status checking / HN / etc.