There is lots of information about LP to DC transfer on this web site (Clive's website).I will almost always do the following:I always check for clipping. (I simply check the peak level, and if it's 0dB I assume it's clipped and I re-record.)I use Wave Repair (Clive's software) to remove "ticks", "clicks", and "pops". It does an amazing job by replacing the defect with the just-preceding or just-following few milliseconds of sound (or a couple of other methods). WARNING - This can be very time consuming. Wave Repair seems to work best when used manually. It usually takes a day (or a weekend) for me to fix-up an LP.I try some noise reduction and/or noisegate. Sometimes there can be artifacts (side effects), so I don't always apply these "filters".If it's an old "dull sounding" recording, I'll add some high-end boost.After I'm done with any other processing, I always normalize (or GoldWave's MaxMatch). This sets the level so that the peaks are exactly 0dB, giving the best signal-to-noise ratio at playback time. It's generally best to normalize the whole album as a single WAV file to retain the relative level between the tracks... Some songs are supposed to be louder or softer than others. Whenever I burn a CD, I always make an extra archive/back-up copy. If I'm doing lots of processing, I make an un-processed archive CD too.
Playing an LP is a mechanical process. Getting a good recording requires good playback as its first step. None of the TTs I’ve seen with USB connections (i.e. their own built-in phono preamp and soundcard) have been other than far low end.
I forgot my most important piece of advice... Don't do it, unless the CD is unavailable! My vinyl transfers almost never end-up quite "CD quality". I'm sure there are exceptions, especially if you have a pristine LP and if the only CD available is an over-compressed remaster... But, last time I was doing this... I was almost done when I found an out-of-print used CD copy, and I bought it!
How does one tell (if possible before purchase) whether a CD is likely to have compression (over-compression to the point where the LP in good condition may be the better alternative)? I have read a couple of 'rules of thumb' like CD's pressed after year 2000....but that's about all I have to go on. Is 'Remaster' a red-flag?