Everyone has a different weakness when it comes to coding. You'll need to review your own work and figure out what took longer than expected before you can figure out how to improve on it.
Some people spend too much time overthinking the design, others jump in too fast and spend their time reworking prior design flaws. Some take forever doing the UI, others get stuck in the DB. If you can figure out what caused the biggest delay with your last project, you'll see the largest improvement if you fix it. I'm sure questions on a specific problem will get more help from others as well.
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Everyone has a different weakness when it comes to coding. You'll need to review your own work and figure out what took longer than expected before you can figure out how to improve on it.
Some people spend too much time overthinking the design, others jump in too fast and spend their time reworking prior design flaws. Some take forever doing the UI, others get stuck in the DB. If you can figure out what caused the biggest delay with your last project, you'll see the largest improvement if you fix it. I'm sure questions on a specific problem will get more help from others as well.