suzieq
It may sound simplistic, but Cleanliness is next to Godliness.
Unless there are some really obvious maintenance issues, firstly make sure that every bit of the property is washed.
Ceilings, paintwork, inside and outside cupboards, the windows, outside the house, paths & driveways (obviously, observe water restrictions), inside the garage, everywhere, plus carpets, blinds & curtains etc. However, it is often cheaper to replace drapes with the ready made variety from Spotlight, than it is to have drapes dry cleaned. Throw out the old terylenes if they are tatty, new ones are very cheap and really jazz a place up - even tho I hate them myself!
When you have finished Spring Cleaning, you will be amazed.
The place will smell, and feel, quite different. It will look as if it has been painted, but if there are areas which are badly scuffed, do one coat of quality paint in the same shade over the freshly washed surface.
Change lamp shades if they are dated or unfashionable, and have an electrician check the wiring if the house if more than about 15 years old. It probably won't have a safety circuit breaker thingy or wired in smoke alarms so have them fitted.
A new upright stove (if appropriate) works wonders in the kitchen.
Give the garden a thorough pruning and remove all rubbish.
Check all the plumbing.
If the budget runs to it, paint out the Mission Brown (Bristol Rye Bread is a lovely colour and covers with one coat).
While all this is going on appoint a busy property manager and have a 'For Let' sign erected at the front boundary.
I have always been blessed with lovely people as my tenants, who enjoy the houses and stay a long time.
Houses don't have to be flash with high tech stuff, just clean and confortable where families can relax, and be proud to invite their friends over.
In my experience, the tenant finds the house that's right for them, and as quality speaks for itself, no lure will be necessary
Good luck with your investment. I hope your tenants are happy in your house and stay a long time.
Regards
Kristine
Suzie, I wouldn't recommend trying to paint the whole house straight up, and only start painting if you are going to complete an entire section, otherwise the existing paint will look even more shabby.
Sugar soap, or my favourtie, Tricleanium, are amazing products which produce amazing results.