When the sentence doesn't sound right, well then there is usually something wrong. If the sentence is slow or just feels weird you should consider rewriting it.
How to Fix Awkward Constructions
There is not rules or specific ways to fix these type of sentences. You will have to develop this awkward sentence hunting skill in order to find them. The best advice on how to fix them is to just keep rewording the sentence till it is running nice and smooth. One guideline you can use to help; read the sentence out loud, often this can be a great help.
Another thing you can do is look at the subject and the verb. Once you have found this then break the sentence down in to its simplest form, then build it up again.
Avoid Word and Phrase Repetition
Yes some words and phrases are really amazing to use in your writing, but we, as the readers, do not want to read the same or similar thing over and over again. If you need to use different synonyms or even take a different approach to the same concept.
Avoid Excessive Intensifiers and Qualifiers
Intensifiers, these are words that add weight or force to the sentence and make it intense. Over using these words can make your sentence loose its meaning.
I am so extremely happy and so excited to be going to this amazing place on this lovely weekend.
This is an example of what over using them can do to your sentence.
Qualifiers indicate limits of your claim. These are necessary in your writing, but over using them can cause a big mess.
Occasionally, when I am sick, I probably will have to go to the doctor most of the time, while I am sick
Just on a little side note for self improvement. I will be doing pushups and situps for the amount of $$$ I earn on this post and will give a short feedback every day at the end of each post. This will be split in half pushups, harf situps. As promised I will be doing 125 pushups, today, for yesterdays post. Any not done will carry onto the next day. 50 is carried over to the next day.