Technical issues for writers usually refer to grammar, spelling, proper setting out of work and so on. They're not the most important side of writing - the creative side is the most vital. Without that there is nothing to edit! Having said that I always see the editing side as getting the basic work into shape and hopefully ready for publication and so nothing to be afraid of. I can understand why every writer prefers the creative side but not why some dread the editing. It's all to help get your work into the best possible shape so why dread that?
The golden rule with grammar and spelling is if you don't know, check and use at least two sources to check with. And it always pays to edit on paper not screen. If you can get someone else to look over a piece of work, someone who is good with these things, before sending the MSS off anywhere, that is useful. You always miss typos! I would say for a novel submission this is crucial. Short stories, well it is helpful but because of the length of the tale you are more likely to pick things up but I would recommend going through the final version (or what you think is the final version!) at least twice and over separate days because what you miss the first time, you are likely to pick up on the second.