I think the trick is, if you don't have lots of time or money, to do one or two things really well. You can easily get defeated if you don't feel you look polished.
I go for- lovely nails, I do Shellac Blue Sky ones myself with a £40 kit I got from Groupon, I get more comments on this aspect of grooming than everything else ever.
Hair- decent cut every now and again, always clean and swishy (use Poundland products so not expensive to maintain)
Nice make-up, I use the cheapest brands but have figured out what I like over the years, it only takes 5 min every morning.
The rest varies, always good leather shoes, never plastic, so I also wear Clarks, other brands.
I don't iron things, I do my eyebrows when I remember, my cleansing routine is non-existent (wash face in shower if remember, shove Sudocream on if getting a tiny bit spotty) and don't wear 'smart' stuff either, but the overall trend is somewhat polished.