As I mentioned in my previous parts, I'm planning to be in Folgerida in the last week of January. As I mentioned in my previous parts, I'm planning to be in Folgerida the last week of January.

"in" can be dropped. Makes it sound more natural, and does not lose the sense of the phrase.

This is my last writingpost before I'm going to skiing. This is my last post before I'm going to skiing.

You could say, "This is the last time I am writing" or "This is the last post". What you have written is technically correct, since "writing" can also be used as a noun, but it doesn't sound super natural

After my holiday I'm going to write about all my experiences. After my holiday I'm going to write about all my experiences.

I've the have a feeling, whenever I wear the white one I need more confidentce. I have a feeling whenever I wear the white one I need more confidence.

Sorry, but did not understand the last part. I'll assume you mean yourself to be more confident, to need trust in yourself. Even though you can keep "I've" as it will maintain the sense of the phrase, it sounds weird, similar to "ivy".

I've the feeling, when I wear the white one that I need more confident. I've the feeling, when I wear the white one that I need more confident.

I think the white colour symbolizes the professionalism on the white court. I think the white colour symbolizes the professionalism on the white court.

When we have a break we drink a jug of beer and in the afternoons, or inat the end of the day we get a bombardino, thatwhich is a eggnog with cream. When we have a break we drink a jug of beer and in the afternoons, or at the end of the day we get a bombardino, which is a eggnog with cream.

I have my own ski boots, helmet and ski glasses. I have my own ski boots, helmet and ski glasses.

I hope it'll be a good weather and we can enjoy fully the whole vacation. I hope it'll be good weather and we can enjoy fully the whole vacation.

I also need strong thights. I also need strong thighs.

I still have a little time to strenghten yetthen. I still have a little time to strengthen.