New Clothes

Today, I bought a new jacket and trousers.

Although they were not cheap at all, they fit me well and the fabric is high-quality. It took a while to make a decision, but in the end, I decided to purchase. I prefer having a little fancy clothing to holding much clothing of mediocre quality/design. I prefer to have a small amount of fancy clothing then to have a large of low quality clothing. *I think this what you where trying to say*

By the way, I've recently tried not to have so many things because it can consume space to place and time to organize. After shopping, I took my old jacket and skirt, which I had bought 10 years ago, from a wardrobe and disposed of them. *To sound more native you can say "threw them away" or "I got rid of them", for the most part people do not use the word disposed in that sense* 

Anyway, I'm going to put on the new jacket and trousers tomorrow. They will help me to lift up my motivation to work.

*overall very good*

"By the way" is when you forget to add a detail. Example, A-"You have a meeting at 3pm, so do not be late" B-"I will not be late" A-" By the way, John will be going with you" B-"ok" "Mind you" is a saying you tell someone to remember a detail they already know. Example, A-"Mom I am going to the park with some friends" B-"Mind you, you have school in the morning so don't say out to late" B-"ok"

"I was playing baseball at the age of 15." would be use for when you are tell someone that you still play basketball. Like "I started to paint when I was the age of 6 and now I am 25 and I still paint. "I played baseball at the age of 15." This would be used as when you tell someone that you use to play basketball. Like "Back in high school I was in the choir(singing group) but now I just sing in the shower" I hope this helps!

The apology letter

Dear Jason,
Please accept my apologies for making noise recently. I have been moved in here for two weeks, so I invited my friends to visit my new apartment. There were also some children here present, it was a little bit hard to make those children to sit quietly. Also, I was too exciting to move into a new apartment, I lost control to spoil myself with my friends. The party kept on in the whole night.
In regard to the noise occurred, I can assure you that the noise will not happen later again, I will keep the matter in heart to alert myself. It would be grateful if you could also provide your sleeping period for my reference, so that I can verify no noise making during that period.
Best regards,
Marco

The first one if some is asking you if you sleep well, and the last two is for telling someone about your self they are interchangeable. Hope this helps!