Laser Toner or InkJet Printouts using Mailing Label or Sticker Papers
works better for Transfers to various Media, and it gives faster results.
Can also use Parchment paper or plastic sheets like overhead projector type sheets

Coat the Transfer Gel lightly onto the media, say wood or glass.
Press to get the air bubbles out.
Let dry an hour or so.
Carefully peel up the plastic sheet


For image printouts on copier paper, you can use Mod Podge 
Some differences in applying though.  Put the mod podge on the picture not the wood 
then apply it to the wood and use a thicker coat of mod podge on the photo.
(needs to be thick enough that you can barely see the picture through the mod podge.
Press to get the air bubbles out.
Let dry for 24 hours.
Wet the paper backing ( damp enough to soak for a few minutes )
Lightly remove the paper backing to reveal the tranferred image.