A few things I'd like to add for knowing if you should adjust your offset or not.tkdLolly wrote:
My general tip to you is try to improve your accuracy. I had a quick look at your profile and your accuracy is not that high. Learning how to perfect your accuracy goes far when you grind for pp or even during multi, where tiny differences in accuracy can make a great difference. It takes a bit of time to start getting consistent 300's. Play easy maps and figure out what timing you have to hit the notes at. If the timing seems uncomfortable or awkward, change your offset.
1. If you don't already make sure your score meter is set to hit accuracy. By this you can see if you are hitting early or late (especially good for watching through on replays so you can see if certain sections cause you to rush or lag behind)
2. When you finish a song hover the cursor over the graph at the bottom. This will give you two statistics your -x.xx/+x.xx & your Unstable Rate (UR). For the first number you want to try and get the +/- to be as close to the same absolute value as possible. So if you are say averages -10/+5 this means you are more often hitting notes early. Adjust the offset so this becomes more even. If this doesn't work than your problem is more likely in how you visually see the notes instead of how you hear the notes. In this case you can either try to a. look closer/further from the hit line so it meshes with your timing better or b. adjust the hit location in your skin.