Ok, if ... then
Dan, if'n it really-o truly-o has to be a top loader, then there are a few things to take into consideration.
1) The mechanical abrasion is so much greater than in a FL that you just can not wash clothes very long. A gentle wash cycle is ok for 15 minutes, otherwise you should not go beyond 10-12 max.
2) Since the water temperature can't rise gradually, as it should for enzymes to work best, you need to pre-soak really dirty stuff for at least 20, better 40 minutes in water around 105°F.
3) Despite their obscene waste of water, TL do a very poor job of rinsing when there is over-sudsing. It is much better to use low-suds detergent and soft water (softened if you have to) then to overdose detergent to make up for hard water. A second or "deep rinse" is a very good idea.
4) The spin speeds of TLs are very low. If you are going to be running your clothes through a tumbler, than either get a spinner running at 1800RPM or so or at least hang the clothes up to dry for a few hours first.
5) TL are much better at balancing than FLs are, but they still benefit a lot from being balanced.
6) Whereas most FL in Europe have at least some ruidmentary "aqua stop" or some such protection, TLs don't. Always turn off the water hoses when you are done washing.
7) Do not overload. A FL can still do an ok job slightly overloaded...a TL needs turnover to clean adequately.
8) Borax, Washing Soda and oxygen bleach make an even greater difference in cleaning efficiency in Tls than in Fls - that super short washing cycle needs all the help it can get. Pre-treat, pre-soak and stuff can still come out clean. Not as
9) The total wash times in a TL are so much shorter than in a FL you can wash more efficiently. But the old rule still applies: Hottest first, then cooler.
Hope this helps - I am still convinced a TL is a mistake, but since you asked, what the hell, might as well make the best of it.