When you Normal Summon this card, use its effect to Special Summon another monster and then Special Summon another monster (such as "Doppelwarrior") or a token to Summon cards like "Destiny HERO - Plasma".
Also you can discard one Level 2 monster to Special Summon "Quickdraw Synchron" and then Normal Summon "Junk Synchron" to Special Summon the discarded card from the Graveyard. If you brought back the monster, and have "Quillbolt Hedgehog" in the Graveyard, you can bring that back as well, for two Synchro Summons in one turn.
Special Summon a Level 2 monster with "Road Warrior", then Normal Summon this card. Then you can Synchro Summon "Junk Archer".
Some cards are able to avoid "Junk Synchron"'s negative effect:
You can use this card's effect to Special Summon "Moja" from the graveyard and then tribute it to Special Summon "King of the Beasts".
When this card's effect resolves as Chain Link 1 and Special Summons a monster with eligible ATK, activate "Inferno Reckless Summon" in response to the resolution of that Chain.
This is especially useful for thinning your deck and modifying Tuning Levels with cards such as "Tuningware". "Junk Destroyer" can also make use of this method.
This card can be useful bringing from your Graveyard a level 2 or lower Tuner monster, allowing you to Synchro Summon twice per turn. For example, activating "Glorious Illusion", bring from your Graveyard "Lumina, Lightsworn Summoner", after that, use her effect to bring another Lightsworn monster like "Lyla, Lightsworn Sorceress", and then, summon "Junk Synchron". If you use "Junk Synchron's" effect to bringing back a "Krebons" or "Plaguespreader Zombie" , you can Synchro Summon 2 level 6 monsters or 1 level 5 and 1 level 7 monster.
It can also be used along with "Synchro Fusionist" for Rank 5 Xyz Summons. Normal Summon "Junk Synchron", Special Summoning "Synchro Fusionist" from the Graveyard. Synchro Summon for any Level 5 Synchro Monster, then use Synchro Fusionist's effect to grab "Instant Fusion" from the Deck. Use "Instant Fusion" to Summon any Level 5 Fusion Monster and Xyz Summon a Rank 5 monster from there.
Use this card to Special Summon "Tenshin" or "The Calculator" from your Graveyard. Then activate "Inferno Reckless Summon" to Special Summon your other copies and use your first with the "Junk Synchron" to Synchro Summon "Junk Warrior". That way you will have 2 "Tenshins" with 1600 Attack each or 2 "Calculators" with 2700 Attack each and a "Junk Warrior" with 2300+1600+1600=5500 Attack or 2300+2700+2700=7700 Attack respectively.
"Junk Synchron" works great with a "Wetlands Deck". Since nearly all of your monsters will be level 2 or lower, summoning "Junk Warrior" is a snap, and will get a great power-up. With Wetlands in play, the monsters that "Junk Warrior" will draw attack from, such as "Swap Frog" or "Ronintoadin" in most cases, will boost his attack to enormous amounts. Note that "Ronintoadin" can NOT be used as a Synchro Material Monster under any condition, but it can boost up "Junk Warrior's" ATK power as stated above.
Another tactic is to use the effect for special summoning "Swap Frog" and send a Water monster from your hand to the graveyard, preferably a Frog. Then with his second effect, send "Ronintoadin" from your deck to the graveyard. Use the effect of "Ronintoadin" to banish the Frog you discarded and special summon. After that, Normal Summon "Junk Synchron" and bring out a Level 2 or under monster from the graveyard. The options from here are fast. You can use this to swarm, a good tactic with frogs. cards good to bring out for this purpose would be "Dupe Frog" or "Unifrog". Another is to bring out "Junk Warrior" and get an 1100 ATK boost, 3500 with "Wetlands" in play. Or you can use the Frogs to Synchro Summon a Level 7 Junk Synchro with a revived Frog. Or, if you revive a level 1 monster, you can summon "Junk Destroyer" and destroy up to three cards on the field. This move only require having "Junk Synchron" and Swap Frog in your hand, so it really isn't that hard.
use "Glow-Up Bulb" and 1 of the token to synchro summon to "Formula Synchron", and draw 2 cards. From that you still have 1 token, 1 "Spore", 1 "T.G. Hyper Librarian", and 1 "Formula Synchron", "Glow-Up Bulb's" effect hasn't used, 3 cards in your hand for more further combo.