1. Make repetition more slowly.
Try to slow down the movement of your body in positive and negative phases of exercises can even try to do the exercises with 3-second delays at every stage!
2. Reduce rest time between sets.
All know that muscles recover during rest, so if you deny them the opportunity to rest between approaches - they will not end up to recover, and this will automatically increase the complexity of the execution of the next repeat!
3. Do exercises with supersets.
The quintessence of the previous Board is generally waiver between two approaches (for example dips + pull-UPS). That is, you first make the two approaches without rest between, then rest before doing the following "dual" approach.
4. Maximally tense the muscles at the top of the movement.
When you perform pull-UPS, try at the top (when your chin is over the bar) to stretch the muscles further back, before beginning to fall. It's not easy, but will allow you to better understand how your own body!
5. Add a partial repetition.
Once you can no longer perform a repetition in the full range - begin to do repetition in a reduced amplitude. And after this I can stay in a static position for even greater loads!
6. Of course you can use the exercises with additional weight hanging on himself ,or vest weighting.