@lightweight I try to be careful about this as well, yet always find obvious mistakes later too. During review our minds show us what we meant to write instead of what we actually wrote.
As suggested, I find changing how the text looks helps. This could mean changing colours, typeface or zoom level. If the source is Markdown or similar I find reviewing the rendered output helps (and then reviewing the source again after tends to find more problems).
@lightweight An experienced writer told me that reviewing from the bottom up helps them find otherwise masked problems. Read the last sentence, then the second last and so on. I haven't tried this seriously but probably should.
@menn0 those are useful suggestions... I guess, if I'm honest with myself, the problem hasn't bad enough yet for me to really change my behaviour :) - ideally, if it's really important, I try to get folks who didn't know what I *meant* to say to look it over... Luckily, I do a lot of editing for others, so I have a few favours I can call :)
@menn0 hasn't *been* bad enough... Now this is getting funny.