Abstain from using steroids for at least eight weeks to 12 weeks, after the cycle ends. Some individuals cannot stay away from steroids for the whole duration and they may start 'bridging'. Here they inject themselves with low doses of a steroid like Testosterone Enanthate (200mg) every two or three weeks. This is not encouraged, because it interferes with recovery and may even prevent you from achieving metabolic homeostasis.
In the final weeks of their steroid cycles, some individuals start reducing their doses. In short, they practice tapering. They may taper their doses for three or four weeks. Here the dose is cut evenly, until finally it is discontinued. However, it is not known if tapering offers any value to the user. No clinical evaluation has even been conducted on the practice. While the technique is often used with thyroid hormones and anti-depressants, it it not recommended when you are using anabolic steroids. All studies that have been conducted on anabolic steroids end with high doses, with no tapering.
Tapering programs are said to aid in the recovery of natural hormones. But the body will not recover as long as a supraphysiological (more than natural level of androgen) is present in the blood. Such levels will usually persist during the entire duration of the tapering period. Tapering is also not proven to reduce muscle catabolism in the post cycle period.
Ultimately, there is no one answer that will suit everyone. Note that needs differ with the user. This advice will hold for body builders who are reasonably conservative and who wish to see substantial results.